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/T3D/gameBase/gameBase.h

@@ -39,6 +39,9 @@
 #include "scene/sceneManager.h"    
 #define __SCENEMANAGER_H__  
 #endif
+#ifndef _IDISPLAYDEVICE_H_
+#include "platform/output/IDisplayDevice.h"
+#endif
 
 class NetConnection;
 class ProcessList;
@@ -418,6 +421,7 @@ public:
    
    // Not implemented here, but should return the Camera to world transformation matrix
    virtual void getCameraTransform (F32 *pos, MatrixF *mat ) { *mat = MatrixF::Identity; }
+   virtual void getEyeCameraTransform ( IDisplayDevice *device, U32 eyeId, MatrixF *mat ) { *mat = MatrixF::Identity; }
 
    /// Returns the water object we are colliding with, it is up to derived
    /// classes to actually set this object.