sdl_image-hg: import from aur
sdl_mixer-hg: import from aur
sdl_ttf-hg: import from aur
sdl-hg: various minor updates
sdl_image-hg: various minor updates
sdl_image-hg: gitignore the local hg clone
sdl_mixer-hg: various minor changes
sdl_mixer-hg: gitignore local repository clone
sdl_ttf-hg: update PKGBUILD to use new VCS source system (+ various)
sdl_ttf-hg: gitignore local repository clone