GRAPHICS: Added stubs for function setScreenBPP
GRAPHICS: Add function to temporarily disable 32-bit rendering
GUI: Cleanup of comments
GRAPHICS: Fixed the (former) setScreenBPP-function
GRAPHICS: Added function for setting overlay format
SDL: Fixed a bug from an earlier commit, mainly affects the GMM and such
GRAPHICS: Various fixes to get GMM working in 32-bits
GRAPHICS: Adding functions for getting preferred format