Resized png to be a multiple of 2

Added some shader files
Minor check changes to texture2D
Did serious changes to eventloop
	- Re enabled the callbacks
	- Repositioned the calling of initialize functions
	- GraphicsManager added
Changed the maingame initialize, now the game no longer stops when restarting it
	- problem with already existing scenes returning a KO;
Added quadcol class = DOES NOT WORK
Edited shader class to be able to load shaders on android from the asset folder.