Remove qtimer timeout for redrawing glwidget.
Renamed some stuff.
Fix bug that prevented successively loading roms.
Fix issue causing emu to freeze because drawing_fram was being set after repaintGLWidget was emitted.
Change audio play/pause functions to single enable/disable function.
Testing out joystick support. All hard-coded for now.
Merge branch 'add-joystick-support' of https://github.com/tineras/TinerasNES_Reworked into add-joystick-support