Add sound support for dig demo
|Reported by:||Kirben||Owned by:||aquadran|
The dig demo has a few sound issues under ScummVM:
It uses separate 1xxx.voc files for speech, with one
folder of speech files per room. With folder names of
location.roomnumber, ie canyon.15
It seems to use Creative VOC format in resources for all
music, instead of imuse.
There are no subtitles in the demo, so this makes the
demo unplayable under ScummVM.
Ticket imported from: #816445. Ticket imported from: feature-requests/140.