Initial version of TextureManager
Simple Shader Manager added.
Methods attach,detach have been moved from Shader to Program class.
Added Singleton class based on Loki library
Merge branch 'TextureManager'

Conflicts:
	scale-buffer/jni/world/includes/Mesh.h
	scale-buffer/jni/world/includes/World.h
	scale-buffer/jni/world/sources/Mesh.cpp
	scale-buffer/jni/world/sources/World.cpp