[Coco] Sierra games with sound!!

[Guillaume Major]

Good news: I managed to figure out the sound format used by the AGI coco 
interpreter. So I wrote a utility to convert the sounds to the coco format 
and it worked! Now KQ1, KQ2, SQ1 and SQ2 are fully playable with sound! I 
had to remove some of them though. I removed the ones that were played in 
the background (because the game would have been paused forever) and I 
removed some loops in the logics code to allow some sounds to only play 
once.

You can download the games from my web server at: 
http://goyim.dyndns.org:8080/coco. I made the source code of my 
modifications available in the Sources folder.

For those interested, I wrote 3 utilities that will help you converting 
Sierra game for the Coco:

- cc3snd to convert AGI sound files to the coco format
- sndpatch to patch the VOL files with the new sound files
- picpatch to remove plot commands (0xFA) from picture resources

You can download them from the AGI Utilities folder.

Now I'm trying to get Police Quest 1 to work but I'm getting a lot of weird 
errors...

Enjoy!

Guillaume