to keep its own copy of the sound data. It could be even further simplified
(I don't really see any reason for having two different sound queues), but
I seem to have reached a point of stability here and I don't want to jinx
it by making further changes yet.
svn-id: r13705
Renamed the resource manager's open/close methods openResource() and
closeResource() to avoid confusion. (It was I who originally shortened
their names to open() and close(), but I've changed my mind now.)
Moved more stuff into Sword2Engine.
svn-id: r11088