Ensure all 2D textures are loaded upright.

Ensure textures loaded by iOS & OSX are flipped upright during loading.
Change CC3Mesh populateAs... parametric population methods to create texture
coordinates assuming texture is upright. Change expectsVerticallyFlippedTextures
of CC3VertexTextureCoordinates and CC3NodesResource to default to NO.
Add environment reflection into standard GLSL shaders.

Add environment reflection into standard GLSL shaders. Consolidate common standard
vertex shaders into CC3TexturableMaterial.vsh.
Fix issue in cocos3d interaction with cocos2d GL state cache.