Oculus VR DK2 Support

- Updated to work with 0.5.x SDK
- Uses Oculus Rendering rather than PostFX
- Stereo rendering refactored so more rendering info is grabbed from the DisplayDevice
- Implements an Offscreen Canvas for in-game gui with oculus
- Message dialogs and metrics display can now go to the OffScreen Canvas (if oculus demo is setup correctly)

Engine/source/postFx/postEffect.cpp

@@ -144,6 +144,20 @@ GFX_ImplementTextureProfile( PostFxTextureProfile,
                             GFXTextureProfile::Static | GFXTextureProfile::PreserveSize | GFXTextureProfile::NoMipmap,
                             GFXTextureProfile::NONE );
 
+GFX_ImplementTextureProfile( VRTextureProfile,
+                            GFXTextureProfile::DiffuseMap,
+                            GFXTextureProfile::PreserveSize |
+                            GFXTextureProfile::RenderTarget |
+                            GFXTextureProfile::NoMipmap,
+                            GFXTextureProfile::NONE );
+
+GFX_ImplementTextureProfile( VRDepthProfile,
+                            GFXTextureProfile::DiffuseMap,
+                            GFXTextureProfile::PreserveSize |
+                            GFXTextureProfile::RenderTarget |
+                            GFXTextureProfile::NoMipmap |
+                            GFXTextureProfile::ZTarget,
+                            GFXTextureProfile::NONE );
 
 void PostEffect::EffectConst::set( const String &newVal )
 {