Bug fixes to Frog Feast for the CD-I

Most of the time is now being spent fixing the remaining issues with Frog Feast, and implementing a few optimizations. I did get multi-player support working. My to-do list is currently down to:
1. Add Sound and Music.
2. Add an 'Exit' option and a credits screen.

There are probably a few additional bugs left; I intend to do quite a bit of testing over the next week. One outstanding problem is incompatibility with the CDI-350 and CDI-605 players.