Refactor the checkerboard shader to use just 2 sines and a round.
Change clear color to a sky blue.
Merge branch 'master' of https://github.com/jimbo00000/OculusGlfwSkeleton
Add a distortion scale parameter to tweakbar.
Rename m_bar to m_pBar.
Add a read-only pixel counter to the new Performance group in the tweakbar.
Add a MPixel/s performance counter to tweakbar.
Push camera params to second-to-last and fold the menu by default.