LICENSE

GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007


Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is
permitted to copy and distribute verbatim copies of this license document, but
changing it is not allowed.

Preamble

The GNU General Public License is a free, copyleft license for software and
other kinds of works.

The licenses for most software and other practical works are designed to take
away your freedom to share and change the works.  By contrast, the GNU General
Public License is intended to guarantee your freedom to share and change all
versions of a program--to make sure it remains free software for all its users.
We, the Free Software Foundation, use the GNU General Public License for most
of our software; it applies also to any other work released this way by its
authors.  You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not price.  Our
General Public Licenses are designed to make sure that you have the freedom to
distribute copies of free software (and charge for them if you wish), that you
receive source code or can get it if you want it, that you can change the
software or use pieces of it in new free programs, and that you know you can do
these things.

To protect your rights, we need to prevent others from denying you these rights
or asking you to surrender the rights.  Therefore, you have certain
responsibilities if you distribute copies of the software, or if you modify it:
responsibilities to respect the freedom of others.

For example, if you distribute copies of such a program, whether gratis or for
a fee, you must pass on to the recipients the same freedoms that you received.
You must make sure that they, too, receive or can get the source code.  And you
must show them these terms so they know their rights.

Developers that use the GNU GPL protect your rights with two steps: (1) assert
copyright on the software, and (2) offer you this License giving you legal
permission to copy, distribute and/or modify it.

For the developers' and authors' protection, the GPL clearly explains that
there is no warranty for this free software.  For both users' and authors'
sake, the GPL requires that modified versions be marked as changed, so that
their problems will not be attributed erroneously to authors of previous
versions.

Some devices are designed to deny users access to install or run modified
versions of the software inside them, although the manufacturer can do so.
This is fundamentally incompatible with the aim of protecting users' freedom to
change the software.  The systematic pattern of such abuse occurs in the area
of products for individuals to use, which is precisely where it is most
unacceptable.  Therefore, we have designed this version of the GPL to prohibit
the practice for those products.  If such problems arise substantially in other
domains, we stand ready to extend this provision to those domains in future
versions of the GPL, as needed to protect the freedom of users.

Finally, every program is threatened constantly by software patents. States
should not allow patents to restrict development and use of software on
general-purpose      computers, but in those that do, we wish to avoid the
special danger that patents applied to a free program could make it effectively
proprietary.  To prevent this, the GPL assures that patents cannot be used to
render the program non-free.

The precise terms and conditions for copying, distribution and modification
follow.

TERMS AND CONDITIONS

0. Definitions.

"This License" refers to version 3 of the GNU General Public License.

"Copyright" also means copyright-like laws that apply to other kinds of works,
such as semiconductor masks.

"The Program" refers to any copyrightable work licensed under this License.
Each licensee is addressed as "you".  "Licensees" and "recipients" may be
individuals or organizations.

To "modify" a work means to copy from or adapt all or part of the work in a
fashion requiring copyright permission, other than the making of an exact copy.
The  resulting work is called a "modified version" of the earlier work or a
work "based on" the earlier work.

A "covered work" means either the unmodified Program or a work based on the
Program.

To "propagate" a work means to do anything with it that, without permission,
would make you directly or secondarily liable for infringement under applicable
copyright law, except executing it on a computer or modifying a private copy.
Propagation includes copying, distribution (with or without modification),
making available to the public, and in some countries other activities as well.

To "convey" a work means any kind of propagation that enables other parties to
make or receive copies.  Mere interaction with a user through a computer
network, with no transfer of a copy, is not conveying.

An interactive user interface displays "Appropriate Legal Notices" to the
extent that it includes a convenient and prominently visible feature that (1)
displays an appropriate copyright notice, and (2) tells the user that there is
no warranty for the work (except to the extent that warranties are provided),
that licensees may convey the work under this License, and how to view a copy
of this License.  If the interface presents a list of user commands or options,
such as a menu, a prominent item in the list meets this criterion.

  1. Source Code.

  The "source code" for a work means the preferred form of the work for making
  modifications to it.  "Object code" means any non-source form of a work.

  A "Standard Interface" means an interface that either is an official standard
  defined by a recognized standards body, or, in the case of interfaces
  specified for a particular programming language, one that is widely used
  among developers working in that language.

  The "System Libraries" of an executable work include anything, other than the
  work as a whole, that (a) is included in the normal form of packaging a Major
  Component, but which is not part of that Major Component, and (b) serves only
  to enable use of the work with that Major Component, or to implement a
  Standard Interface for which an implementation is available to the public in
  source code form.  A "Major Component", in this context, means a major
  essential component (kernel, window system, and so on) of the specific
  operating system (if any) on which the executable work runs, or a compiler
  used to produce the work, or an object code interpreter used to run it.

  The "Corresponding Source" for a work in object code form means all the
  source code needed to generate, install, and (for an executable work) run the
  object code and to modify the work, including scripts to control those
  activities.  However, it does not include the work's System Libraries, or
  general-purpose tools or generally available free programs which are used
  unmodified in performing those activities but which are not part of the work.
  For example, Corresponding Source includes interface definition files
  associated with source files for the work, and the source code for shared
  libraries and dynamically linked subprograms that the work is specifically
  designed to require, such as by intimate data communication or control flow
  between those subprograms and other parts of the work.

  The Corresponding Source need not include anything that users can regenerate
  automatically from other parts of the Corresponding Source.

  The Corresponding Source for a work in source code form is that same work.

  2. Basic Permissions.

  All rights granted under this License are granted for the term of copyright
  on the Program, and are irrevocable provided the stated conditions are met.
  This License explicitly affirms your unlimited permission to run the
  unmodified Program.  The output from running a covered work is covered by
  this License only if the output, given its content, constitutes a covered
  work.  This License acknowledges your rights of fair use or other equivalent,
  as provided by copyright law.

  You may make, run and propagate covered works that you do not convey, without
  conditions so long as your license otherwise remains in force.  You may
  convey covered works to others for the sole purpose of having them make
  modifications exclusively for you, or provide you with facilities for running
  those works, provided that you comply with the terms of this License in
  conveying all material for which you do not control copyright.  Those thus
  making or running the covered works for you must do so exclusively on your
  behalf, under your direction and control, on terms that prohibit them from
  making any copies of your copyrighted material outside their relationship
  with you.

  Conveying under any other circumstances is permitted solely under the
  conditions stated below.  Sublicensing is not allowed; section 10 makes it
  unnecessary.

  3. Protecting Users' Legal Rights From Anti-Circumvention Law.

  No covered work shall be deemed part of an effective technological measure
  under any applicable law fulfilling obligations under article 11 of the WIPO
  copyright treaty adopted on 20 December 1996, or similar laws prohibiting or
  restricting circumvention of such measures.

  When you convey a covered work, you waive any legal power to forbid
  circumvention of technological measures to the extent such circumvention is
  effected by exercising rights under this License with respect to the covered
  work, and you disclaim any intention to limit operation or modification of
  the work as a means of enforcing, against the work's users, your or third
  parties' legal rights to forbid circumvention of technological measures.

  4. Conveying Verbatim Copies.

  You may convey verbatim copies of the Program's source code as you receive
  it, in any medium, provided that you conspicuously and appropriately publish
  on each copy an appropriate copyright notice; keep intact all notices stating
  that this License and any non-permissive terms added in accord with section 7
  apply to the code; keep intact all notices of the absence of any warranty;
  and give all recipients a copy of this License along with the Program.

  You may charge any price or no price for each copy that you convey, and you
  may offer support or warranty protection for a fee.

  5. Conveying Modified Source Versions.

  You may convey a work based on the Program, or the modifications to produce
  it from the Program, in the form of source code under the terms of section 4,
  provided that you also meet all of these conditions:

    a) The work must carry prominent notices stating that you modified it, and
    giving a relevant date.

    b) The work must carry prominent notices stating that it is released under
    this License and any conditions added under section 7.  This requirement
    modifies the requirement in section 4 to "keep intact all notices".

    c) You must license the entire work, as a whole, under this License to
    anyone who comes into possession of a copy.  This License will therefore
    apply, along with any applicable section 7  additional terms, to the whole
    of the work, and all its parts,     regardless of how they are packaged.
    This License gives no  permission to license the work in any other way, but
    it does not  invalidate such permission if you have separately received it.

    d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has interactive
    interfaces that do not display  Appropriate Legal Notices, your work need
    not make them do so.

  A compilation of a covered work with other separate and independent works,
  which are not by their nature extensions of the covered work, and which are
  not combined with it such as to form a larger program, in or on a volume of a
  storage or distribution medium, is called an "aggregate" if the compilation
  and its resulting copyright are not used to limit the access or legal rights
  of the compilation's users beyond what the individual works permit.
  Inclusion of a covered work in an aggregate does not cause this License to
  apply to the other parts of the aggregate.

  6. Conveying Non-Source Forms.

  You may convey a covered work in object code form under the terms of sections
  4 and 5, provided that you also convey the machine-readable Corresponding
  Source under the terms of this License, in one of these ways:

    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium customarily used
    for software interchange.

    b) Convey the object code in, or embodied in, a physical product (including
    a physical distribution medium), accompanied by a written offer, valid for
    at least three years and valid for as long as you offer spare parts or
    customer support for that product model, to give anyone who possesses the
    object code either (1) a  copy of the Corresponding Source for all the
    software in the product that is covered by this License, on a durable
    physical medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this  conveying of
    source, or (2) access to copy the Corresponding Source from a network
    server at no charge.

    c) Convey individual copies of the object code with a copy of the written
    offer to provide the Corresponding Source.  This  alternative is allowed
    only occasionally and noncommercially, and  only if you received the object
    code with such an offer, in accord with subsection 6b.

    d) Convey the object code by offering access from a designated place
    (gratis or for a charge), and offer equivalent access to the Corresponding
    Source in the same way through the same place at no further charge.  You
    need not require recipients to copy the Corresponding Source along with the
    object code.  If the place to  copy the object code is a network server,
    the Corresponding Source may be on a different server (operated by you or a
    third party) that supports equivalent copying facilities, provided you
    maintain clear directions next to the object code saying where to find the
    Corresponding Source.  Regardless of what server hosts the Corresponding
    Source, you remain obligated to ensure that it is available for as long as
    needed to satisfy these requirements.

    e) Convey the object code using peer-to-peer transmission, provided  you
    inform other peers where the object code and Corresponding Source of the
    work are being offered to the general public at no charge under subsection
    6d.

  A separable portion of the object code, whose source code is excluded from
  the Corresponding Source as a System Library, need not be included in
  conveying the object code work.

  A "User Product" is either (1) a "consumer product", which means any tangible
  personal property which is normally used for personal, family, or household
  purposes, or (2) anything designed or sold for incorporation into a dwelling.
  In determining whether a product is a consumer product, doubtful cases shall
  be resolved in favor of coverage.  For a particular product received by a
  particular user, "normally used" refers to a typical or common use of that
  class of product, regardless of the status of the particular user or of the
  way in which the particular user actually uses, or expects or is expected to
  use, the product.  A product is a consumer product regardless of whether the
  product has substantial commercial, industrial or non-consumer uses, unless
  such uses represent the only significant mode of use of the product.

  "Installation Information" for a User Product means any methods, procedures,
  authorization keys, or other information required to install and execute
  modified versions of a covered work in that User Product from a modified
  version of its Corresponding Source.  The information must suffice to ensure
  that the continued functioning of the modified object code is in no case
  prevented or interfered with solely because modification has been made.

  If you convey an object code work under this section in, or with, or
  specifically for use in, a User Product, and the conveying occurs as part of
  a transaction in which the right of possession and use of the User Product is
  transferred to the recipient in perpetuity or for a fixed term (regardless of
  how the transaction is characterized), the Corresponding Source conveyed
  under this section must be accompanied by the Installation Information.  But
  this requirement does not apply if neither you nor any third party retains
  the ability to install modified object code on the User Product (for example,
  the work has been installed in ROM).

  The requirement to provide Installation Information does not include a
  requirement to continue to provide support service, warranty, or updates for
  a work that has been modified or installed by the recipient, or for the User
  Product in which it has been modified or installed.  Access to a network may
  be denied when the modification itself materially and adversely affects the
  operation of the network or violates the rules and protocols for
  communication across the network.

  Corresponding Source conveyed, and Installation Information provided, in
  accord with this section must be in a format that is publicly documented (and
  with an implementation available to the public in source code form), and must
  require no special password or key for unpacking, reading or copying.

  7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of this License
  by making exceptions from one or more of its conditions. Additional
  permissions that are applicable to the entire Program shall be treated as
  though they were included in this License, to the extent that they are valid
  under applicable law.  If additional permissions apply only to part of the
  Program, that part may be used separately under those permissions, but the
  entire Program remains governed by this License without regard to the
  additional permissions.

  When you convey a copy of a covered work, you may at your option remove any
  additional permissions from that copy, or from any part of it.  (Additional
  permissions may be written to require their own removal in certain cases when
  you modify the work.)  You may place additional permissions on material,
  added by you to a covered work, for which you have or can give appropriate
  copyright permission.

  Notwithstanding any other provision of this License, for material you add to
  a covered work, you may (if authorized by the copyright holders of that
  material) supplement the terms of this License with terms:

    a) Disclaiming warranty or limiting liability differently from the  terms
    of sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal notices or  author
    attributions in that material or in the Appropriate Legal Notices displayed
    by works containing it; or

    c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in reasonable
    ways as different from the original version; or

    d) Limiting the use for publicity purposes of names of licensors or authors
    of the material; or

    e) Declining to grant rights under trademark law for use of some trade
    names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of that material by
    anyone who conveys the material (or modified versions of it) with
    contractual assumptions of liability to the recipient, for any liability
    that these contractual assumptions directly impose on those licensors and
    authors.

  All other non-permissive additional terms are considered "further
  restrictions" within the meaning of section 10.  If the Program as you
  received it, or any part of it, contains a notice stating that it is governed
  by this License along with a term that is a further restriction, you may
  remove that term.  If a license document contains a further restriction but
  permits relicensing or conveying under this License, you may add to a covered
  work material governed by the terms of that license document, provided that
  the further restriction does not survive such relicensing or conveying.

  If you add terms to a covered work in accord with this section, you must
  place, in the relevant source files, a statement of the additional terms that
  apply to those files, or a notice indicating where to find the applicable
  terms.

  Additional terms, permissive or non-permissive, may be stated in the form of
  a separately written license, or stated as exceptions; the above requirements
  apply either way.

  8. Termination.

  You may not propagate or modify a covered work except as expressly provided
  under this License.  Any attempt otherwise to propagate or modify it is void,
  and will automatically terminate your rights under this License (including
  any patent licenses granted under the third paragraph of section 11).

  However, if you cease all violation of this License, then your license from a
  particular copyright holder is reinstated (a) provisionally, unless and until
  the copyright holder explicitly and finally terminates your license, and (b)
  permanently, if the copyright holder fails to notify you of the violation by
  some reasonable means prior to 60 days after the cessation.

  Moreover, your license from a particular copyright holder is reinstated
  permanently if the copyright holder notifies you of the violation by some
  reasonable means, this is the first time you have received notice of
  violation of this License (for any work) from that copyright holder, and you
  cure the violation prior to 30 days after your receipt of the notice.

  Termination of your rights under this section does not terminate the licenses
  of parties who have received copies or rights from you under this License.
  If your rights have been terminated and not permanently reinstated, you do
  not qualify to receive new licenses for the same material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or run a copy
  of the Program.  Ancillary propagation of a covered work occurring solely as
  a consequence of using peer-to-peer transmission to receive a copy likewise
  does not require acceptance.  However, nothing other than this License grants
  you permission to propagate or modify any covered work.  These actions
  infringe copyright if you do not accept this License.  Therefore, by
  modifying or propagating a covered work, you indicate your acceptance of this
  License to do so.

  10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically receives a
  license from the original licensors, to run, modify and propagate that work,
  subject to this License.  You are not responsible for enforcing compliance by
  third parties with this License.

  An "entity transaction" is a transaction transferring control of an
  organization, or substantially all assets of one, or subdividing an
  organization, or merging  organizations.  If propagation of a covered work
  results from an entity transaction, each party to that transaction who
  receives a copy of the work also receives whatever licenses to the work the
  party's predecessor in interest had or could give under the previous
  paragraph, plus a right to possession of the Corresponding Source of the work
  from the predecessor in interest, if the predecessor has it or can get it
  with reasonable efforts.

  You may not impose any further restrictions on the exercise of the rights
  granted or affirmed under this License.  For example, you may not impose a
  license fee, royalty, or other charge for exercise of rights granted under
  this License, and you may not initiate litigation (including a cross-claim or
  counterclaim in a lawsuit) alleging that any patent claim is infringed by
  making, using, selling, offering for sale, or importing the Program or any
  portion of it.

  11. Patents.

  A "contributor" is a copyright holder who authorizes use under this License
  of the Program or a work on which the Program is based.  The work thus
  licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims owned or
  controlled by the contributor, whether already acquired or hereafter
  acquired, that would be infringed by some manner, permitted by this License,
  of making, using, or selling its contributor version, but do not include
  claims that would be infringed only as a consequence of further modification
  of the contributor version.  For purposes of this definition, "control"
  includes the right to grant patent sublicenses in a manner consistent with
  the requirements of this License.

  Each contributor grants you a non-exclusive, worldwide, royalty-free patent
  license under the contributor's essential patent claims, to make, use, sell,
  offer for sale, import and otherwise run, modify and propagate the contents
  of its contributor version.

  In the following three paragraphs, a "patent license" is any express
  agreement or commitment, however denominated, not to enforce a patent (such
  as an express permission to practice a patent or covenant not to sue for
  patent infringement).  To "grant" such a patent license to a party means to
  make such an agreement or commitment not to enforce a patent against the
  party.

  If you convey a covered work, knowingly relying on a patent license, and the
  Corresponding Source of the work is not available for anyone to copy, free of
  charge and under the terms of this License, through a publicly available
  network server or other readily accessible means, then you must either (1)
  cause the Corresponding Source to be so available, or (2) arrange to deprive
  yourself of the benefit of the patent license for this particular work, or
  (3) arrange, in a manner consistent with the requirements of this License, to
  extend the patent license to downstream recipients.  "Knowingly relying"
  means you have actual knowledge that, but for the patent license, your
  conveying the covered work in a country, or your recipient's use of the
  covered work in a country, would infringe one or more identifiable patents in
  that country that you have reason to believe are valid.

  If, pursuant to or in connection with a single transaction or arrangement,
  you convey, or propagate by procuring conveyance of, a covered work, and
  grant a patent license to some of the parties receiving the covered work
  authorizing them to use, propagate, modify or convey a specific copy of the
  covered work, then the patent license you grant is automatically extended to
  all recipients of the covered work and works based on it.

  A patent license is "discriminatory" if it does not include within the scope
  of its coverage, prohibits the exercise of, or is conditioned on the
  non-exercise of one or more of the rights that are specifically granted under
  this License.  You may not convey a covered work if you are a party to an
  arrangement with a third party that is in the business of distributing
  software, under which you make payment to the third party based on the extent
  of your activity of conveying the work, and under which the third party
  grants, to any of the parties who would receive the covered work from you, a
  discriminatory patent license (a) in connection with copies of the covered
  work conveyed by you (or copies made from those copies), or (b) primarily for
  and in connection with specific products or compilations that contain the
  covered work, unless you entered into that arrangement, or that patent
  license was granted, prior to 28 March 2007.

  Nothing in this License shall be construed as excluding or limiting any
  implied license or other defenses to infringement that may otherwise be
  available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

  If conditions are imposed on you (whether by court order, agreement or
  otherwise) that contradict the conditions of this License, they do not excuse
  you from the conditions of this License.  If you cannot convey a covered work
  so as to satisfy simultaneously your obligations under this License and any
  other pertinent  obligations, then as a consequence you may not convey it at
  all.  For example, if you agree to terms that obligate you to collect a
  royalty for further conveying from those to whom you convey the Program, the
  only way you could satisfy both those terms and this License would be to
  refrain entirely from conveying the Program.

  13. Use with the GNU Affero General Public License.

  Notwithstanding any other provision of this License, you have permission to
  link or combine any covered work with a work licensed under version 3 of the
  GNU Affero General Public License into a single combined work, and to convey
  the resulting work.  The terms of this License will continue to apply to the
  part which is the covered work, but the special requirements of the GNU
  Affero General Public License, section 13, concerning interaction through a
  network will apply to the combination as such.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions of the
  GNU General Public License from time to time.  Such new versions will be
  similar in spirit to the present version, but may differ in detail to address
  new problems or concerns.

  Each version is given a distinguishing version number.  If the Program
  specifies that a certain numbered version of the GNU General Public License
  "or any later version" applies to it, you have the option of following the
  terms and conditions either of that numbered version or of any later version
  published by the Free Software Foundation.  If the Program does not specify a
  version number of the GNU General Public  License, you may choose any version
  ever published by the Free Software Foundation.

  If the Program specifies that a proxy can decide which future versions of the
  GNU General Public License can be used, that proxy's public statement of
  acceptance of a version permanently authorizes you to choose that version for
  the Program.

  Later license versions may give you additional or different permissions.
  However, no additional obligations are imposed on any author or copyright
  holder as a result of your choosing to follow a later version.

  15. Disclaimer of Warranty.

  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT  PERMITTED BY APPLICABLE
  LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
  OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
  EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE
  ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
  SHOULD THE  PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
  SERVICING, REPAIR OR CORRECTION.

  16. Limitation of Liability.

  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
  ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
  PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
  GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
  OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR
  DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR
  A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
  HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE    POSSIBILITY OF SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided above
  cannot be given local legal effect according to their terms, reviewing courts
  shall apply local law that most closely approximates an absolute waiver of
  all civil liability in connection with the Program, unless a warranty or
  assumption of liability accompanies a copy of the Program in return for a
  fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest possible
  use to the public, the best way to achieve this is to make it free software
  which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest to
  attach them to the start of each source file to most effectively state the
  exclusion of warranty; and each file should have at least the "copyright"
  line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the Free
    Software Foundation, either version 3 of the License, or (at your option)
    any later version.

    This program is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
    more details.

    You should have received a copy of the GNU General Public License along
    with this program.  If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If the program does terminal interaction, make it output a short notice like
  this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author> This program comes with
    ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
    and you are welcome to redistribute it  under certain conditions; type
    `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands might
be  different; for a GUI interface, you would use an "about box".

  You should also get your employer (if you work as a programmer) or school, if
  any, to sign a "copyright disclaimer" for the program, if necessary. For more
  information on this, and how to apply and follow the GNU GPL, see
  <http://www.gnu.org/licenses/>.

  The GNU General Public License does not permit incorporating your program
  into proprietary programs.  If your program is a subroutine library, you may
  consider it more useful to permit linking proprietary applications with the
  library.  If this is what you want to do, use the GNU Lesser General Public
  License instead of this License.  But first, please read
  <http://www.gnu.org/philosophy/why-not-lgpl.html>.