Added GL specific method to obtain default framebuffer from displayMgr
TextureAttrs interface cleanup
Moved emscripten code from OpenGL headers to OpenGLES2 headers
Minor code cleanup
Added a HasDepth method to TextureSetup class
Added methods IsDepthFormat and IsDepthStencilFormat to PixelFormat class
Missing GL error checks
Removed redundant code from MeshFactoryTest
Newline at end of file
Initial render target code