Copy, Paste, Select events. Edit box almost working with paste. At work.
Trying to make Mod Key presses work
Fixed pasting and key events
New key events in edit box. WIP!
New text positioning. WIP!
Edit box fully functional.
Edit box cleanup and minor fix
Gui_slider implementation
gui_slider finalized with both configurations
CHERRY PICK: gui_image added

Conflicts:
	src/tests/tinyxml_test_application.cpp
vertical slider init value fixed
Merge branch 'further_gui_work' into development