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/math/mathUtils.h

@@ -39,6 +39,10 @@
 #include "core/util/tVector.h"
 #endif
 
+#ifndef _MATHUTIL_FRUSTUM_H_
+#include "math/util/frustum.h"
+#endif
+
 
 class Box3F;
 class RectI;
@@ -326,6 +330,13 @@ namespace MathUtils
                      F32 aspectRatio, 
                      F32 nearPlane );
 
+   void makeFovPortFrustum( Frustum *outFrustum,
+                             bool isOrtho,
+                             F32 nearDist,
+                             F32 farDist,
+                             const FovPort &inPort,
+                             const MatrixF &transform = MatrixF(1) );
+
    /// Build a GFX projection matrix from the frustum parameters
    /// including the optional rotation required by GFX.
    void makeProjection( MatrixF *outMatrix,