Enable supertux!

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2686 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Add supertux2 launcher. I finally have a real SDL2 app

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2687 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
SDL2 default branch doesn't compile right now... switch to a release

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2688 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Supertux needs SDL_image 2.0

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2689 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
supertux installs to /opt/games, not /opt/bin

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2690 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Wait it seems the defualt branch of SDL2 compiles?

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2691 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Set supertux2's renderer to sdl, not glx
Supertux can wayland now!

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2692 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Totally remove old nouveau build scripts

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2693 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9