Comment out mag calibration code (it was removed from the SDK)
Create sensor fusion device after OVR::Init, release it before OVR::Destroy.
Use gl::draw(texture&, rect) instead of gl::drawSolidRect, this deals with flipped texture coordinates better.
Must of missed this when cleaning up commits.
Clean out auto calibration code more properly.
Merge pull request #1 from bzztbomb/feature/upgrade_to_0.2.5c

Feature/upgrade to 0.2.5c from bzztbomb