Fix EditorEngine startup, editor camera, grid rendering
Manipulate GraphicsSceneView directly instead of Framework::Camera
Fix cache loading for UTF-8
Remove 'DataPC - Copy' directory
Spiff up README
Made README logo link to heliumproject.org
Merge from master to entity_refactor

Conflicts:
	Editor/EditorEngine.cpp
	Editor/EditorEngine.h
	SceneGraph/Viewport.cpp
	SceneGraph/Viewport.h