Bringing all the changes done (mostly by baggyg) in the OVRPassToVR branch bringing over the major FP related changes to master.
Please refer to that branch for the individual changes that have all been brought over in this single commit.
Co-Authored-By: Grant Bagwell <general@grantbagwell.co.uk>
- decomposed the MVP into three separate matrices so the view matrix only needs to be supplied to the shader once per frame
- huge speed boost to the render thread, only a handful of ms per frame now, any framedrops are purely from the GPU
