We initialize them in the DraciEngine constructor, but don't play any sounds
yet. Checked that it works for all existing sound files (required several
work-arounds against unspoken specification).
When copying the interface from barchive.h, I decided to remove some const's
from there, because getFile() wasn't really behaving like const.
Removed some static Common::String instances.
svn-id: r44953
All currently defined featues will be supported. I have implemented
everything boilerplatish, except for the actual game saving/loading (which
will come in the next commit), getting volumes from the configuration
(because we don't play sounds yet), and changing subtitles.
svn-id: r44583
