Convert header imports to use framework style. To avoid problems building the iOS versions using copied headers.
Conditionally disable features only avaliable on old desktop versions of OpenGL.
Remove project headers from pch.
Disable another desktop-only feature when building for iOS.

This code won’t even work without those features, but it compiles.
Remove empty search path.
BAScene as a static library for iOS. Compiles, probably doesn’t work.