This lets us get rid of m_autorelease and m_destroy and we’ll be able
to implement init_game/init_draw later, for stuff that must happen
on the render thread.

If resolution is set to (0,0) then a fullscreen app is created.

and 2) fuck the Visual Studio compiler that crashes when confused.

the matrix code itself.

whether to use the system mouse pointer or not.

tested wherever relevant.

sub-millisecond but can be improved if we get rid of SDL timers.