Fix issues

Allow the library to load relative to the tcl package scripts
Do not generate errors on errorCode or errorInfo when undefined
Replace links with files in autoconf/automake components

New configuration options

Enhancement autogen.sh will now honor NOCONFIGURE.
The autogen.sh will now generate code based on the TCL stub library.

NOCONFIGURE=1 ./autogen.sh
./configure --enable-tclstub
make

v2.3.6

Make FREE() macro a legal expression.

v2.3.5

Update version in configure.ac

v2.3.4

Re-release with configure script, per discussion with @snoe925

(replaces v2.3.3 due to .gitignore conflict)

v2.3.2

• Implement --with-tk=no in configure script.
• Modernize AM_INIT_AUTOMAKE usage and fix build, run tests in CI
• Find tkConfig.sh from macOS stock libraries
• Normalize home directory in prompts to avoid display oddities

Fix version tags and Travis-CI build

Fix missed autoconf version settings.
Add libtool if present to autogen.sh. Use libtoolize in autogen.sh if present.
Oddly installing libreadline-dev removed libtoolize. Very confusing.

Release contributed enhancements

Platform build enhancements.
Auto save history.
See commit history for details.

TclOO and iTcl object support and bug fixes

• TclOO objects are recognized and tab completion is now provided for methods.
• iTcl objects are recognized and tab completion provided for methods plus variable name completion provided for cget and configure methods.
• $ regression fixed.
• regression in tab completion of filenames of external commands is now fixed.
• tclreadline is now compatible with GNU Readline 6.x.
• Several new test cases have been added.

Sincere thanks to @dbohdan for this work. This work was funded by a bounty program established by FlightAware (https://github.com/flightaware/Tcl-bounties) and fulfilled the terms of the bounty offered for work on tclreadline.