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
Since this file contains a list of global variables which are accessed
both directly by the engine and - presumably - by the scripts, this could
lead to some nasty regressions. I've triple-checked the list against the
old version, so it *should* be ok, I just thought I'd point it out.
svn-id: r10268