This makes the window resizable in desktop mode, and fixed size otherwise.
Fullscreen desktop has always the dame resolution as the desktop.
Add config setting to specify initial display.
Add config setting for the refresh rate (not yet properly integrated)
Closes#17
This untangles some of the gigantic kitchen sink headers
in an attempt to split things into smaller files.
Also don't include gl.h, glext.h, windows.h,
and other such nonsense *everywhere*.
Lots of cleanups on the way too. More dead/unused code removal.
Remove incrFlag(), decrFlag() Lua functions.