[Coco] 4 new Sierra games for your coco!

[Guillaume Major]

Hi everyone,

I adapted 4 more Sierra AGI games for the coco: 

- Manhunter 1 and 2
- Gold Rush! 
- The Black Cauldron 

Now all Sierra AGI games, except "Mixed Up Mother Goose", can be played on the coco.

You can download them at http://goyim.dyndns.org:8080/coco

Enjoy!

Guillaume