Micro fix for crashing after intense backspacing.
Edit box submit event and clearing functionality.
Focus event fix.
sigc++ linked for linux
using system freetype lib on linux
tiny xml add linux
added more linux libs
gui event fix in progress..
Merge branch 'development' into test_kursinis

Conflicts:
	projects/CodeBlocks/ZombieGame.cbp
fix on_event func in test
fix window, env on_event funcs

Signed-off-by: serengeor <serengeor@gmail.com>
Merge branch 'development' into test_kursinis
fix enter check, return true when handling enter event
few fixes for some events passing wrong caller
Merge branch 'development' into test_kursinis
window set to not visible instead of removing from gui env. when close button is pressed.
Merge branch 'development' into test_kursinis
edit box, delete key support
Merge branch 'development' into test_kursinis
fix edit box delete key