. NB. whenever switching back to non-full-screen, then it will restore the default desktop resolution.
. Allow -no-full-screen to be placed before -fs-height=<best|nnnn> (previously it only worked when placed afterwards)
. class hierarchy: WinVideo IS_A Video (ie. WinVideo is a subclass of Video)
. GetVideo() singleton instance of WinVideo in AppleWin.cpp, exposed via Interface.h
. Split AppleWin -> Core with the functionality really needed by the emulator.
. Split AppleWin -> Utilities for generic code not called by other emulator components.
. Split AppleWin -> CmdLine for the command line option parsing.