EBG with 'notify' functions (draft 2)

Some little struggles with Makefile & other files...

EBG with 'notify' functions (draft 1)

Initial work to add to EBG notification functions.

11.0.1: Micro bug fixes in previous 11.0.0 version.

In easybashgui.lib, changes are just related to gtkdialog version comparing and an explanatory sentence in text() function in dialog mode (for whiptail users), while in other ancillary modules there are minor changes (e.g. the exiting message).

New Posix version

Time for EBG to get compliant to Posix standard. Enjoy!

A little bugfix release after 4 years

Four years are... enough to test a release: EBG did work so far like a charm.
Only two minor problems (hence this release):

1. sourcing easybashlib Bash complains about "BASH_SOURCE" and "FUNCNAME"... ok Bash! I will not declare an internal variable light-heartedly anymore... ;-)
2. Yad hates arrows keys in args... the only possible fix is change arrows chars in menu/list in a temporary string.
   Last change in this release: header in yad menu() is removed.

Input 1 accepts two args

In this release I fixed an ancient EBG limitation: "input 1" function was limited to one argument.
That because Xdialog doesn't support for one-field-input widget, and all other modes had to adapt to this strange behavior. Since many people asked me about, I finally decided to fix this limitation. So now you can type: "source easybashgui; input 1 name foo", at last.
However, for backward compatibility, old behavior is accepted.