Oculus Rift Improvements

- Now requires OVR SDK 0.2.5
- New chromatic aberration correction shader.  Can be disabled by
setting $pref::OculusVR::UseChromaticAberrationCorrection to false prior
to enabling Rift display (such as for screen shots).
- FXAA on by default when using full screen on the Rift.
- Can now manually override IPD from script.  Otherwise value set in
profile is used.
- Raw sensor data now available through input events (set
$OculusVR::GenerateSensorRawEvents to true) and console methods.  The
raw data is acceleration, angular velocity, and magnetometer reading.
- Can determine if magnetometer calibration data is available using a
console method in order to notify the user.

Engine/source/platform/input/oculusVR/oculusVRUtil.cpp

@@ -73,4 +73,19 @@ void calculateAxisRotation(const MatrixF& inRotation, const F32& maxAxisRadius,
    outRotation.y = axis.y;
 }
 
-}
+void convertAcceleration(OVR::Vector3f& inAcceleration, VectorF& outAcceleration)
+{
+   outAcceleration.set(inAcceleration.x, -inAcceleration.z, inAcceleration.y);
+}
+
+void convertAngularVelocity(OVR::Vector3f& inAngVel, EulerF& outAngVel)
+{
+   outAngVel.set(-inAngVel.x, inAngVel.z, -inAngVel.y);
+}
+
+void convertMagnetometer(OVR::Vector3f& inMagnetometer, VectorF& outMagnetometer)
+{
+   outMagnetometer.set(inMagnetometer.x, -inMagnetometer.z, inMagnetometer.y);
+}
+
+}