AbsTK v1.1.1 [Bugfix]

Fixes last patch's new features

AbsTK v1.1

To this update:

• Added handling to missing GTK or Curses;
• Added support to Lua 5.1 and Lua 5.2.

AbsTK 1.0.0

First AbsTK release.
Features the basic widgets and functions to produce and manage Curses and GTK UIs abstractly.