Gnuboy port to the XBox v1

I added Gameshark functionality to Gnuboy as well as a custom cheat-code
searching engine.  It's a little clumsy, but it gets the job done.

Oh - if you're inputting gameshark codes, don't worry about the first two 
digits.  For example, if you see a gameshark code called "910599c3"
go ahead and put in "010599c3".  It should have the same effect.

TODO: Add support for ZIP files
      Fix sound - same kind of problem as with Stella - really annoying

If all the GB/GBC roms cannot fit on a DVD-R, then I'll definitely add ZIP
file support.  I'm almost positive they'll fit uncompressed, however.

Enjoy!
