FreeDink 108.4

Here's a formula for the FreeDink game, based on this Portfile: http://trac.macports.org/browser/trunk/dports/games/freedink/Portfile

This isn't ready to merge yet since, when running the game, I get these image loading errors which I think are coming from `sdl_image`:

> [ERROR] Sprite_load_pak error:  Couldn't load dinkL-01.bmp in /usr/local/Cellar/freedink/108.4/share/dink/dink/graphics/Startme/options/dir.ff.
>[ERROR] Failed to load but3-01.bmp from fastfile /usr/local/Cellar/freedink/108.4/share/dink/dink/graphics/Startme/options/dir.ff: Unsupported image format
> [ERROR] Failed to load but3-01.bmp from fastfile /usr/local/Cellar/freedink/108.4/share/dink/dink/graphics/Startme/options/dir.ff (see error above)
> [ERROR] Sprite_load_pak error:  Couldn't load but3-01.bmp in /usr/local/Cellar/freedink/108.4/share/dink/dink/graphics/Startme/options/dir.ff.