* Initial work to get everything running on SDL2.
* Almost there.
* Compiles sort of but blows up.
* Got no ndata to display properly.
Merge branch 'master' into sdl2
* Seems to load and run now, keyboard input is broken though.
* Fixed keybindings with SDL2.
* Fixed warning.
* Made stuff a bit cleaner.
* Added hackish SDL2 flags to configure script.
* Fixed joystick.
* Whitespace.
* Fixed warning.
* Fixed some warnings due to behaviour changes with sdl2-config.
* Disable mkspr with SDL2.