Development/Sandbox/Render/Source/Render.cpp
 * Forgot to dirty matrices when pushing and popping (which broke the Leap demo a few commits back).

Development/Sandbox/Render/Source/RenderPrivate.cpp
Development/Sandbox/Render/Source/RenderPrivate.h
 * Matrix cleanliness is now checked through accessors.

Development/Apps/ProtoWindow/Source/Main.cpp
 * Brought up to scratch.