Readme update for Qt Ubuntu build
Don't translate bone weights to floats unnecessarily. Minor optimization to ApplyShader, pushing it down the profile from 2% to 0.5% in Wipeout.
Merge pull request #603 from Xele02/master

Update readme for Qt Ubuntu build
Fix error in vertex shader compiler - no uniform called u_matambient
Fix screen size when not using buffered rendering on Android
Some shader and vertex format optimizations