Run with "-mod=official" for the default behaviour (same as specifying
nothing), and with "-mod=official -mod=antigravity -mod=starwars" to
load multiple mods (with the later-mentioned ones having a higher
priority than the earlier ones).
Added "_test.minimal" mod which can be used instead of "official" - it
provides just enough for the actor viewer to run, plus one unit skin.
Added test script for the COLLADA converter, which converts the models
and creates some actors in a "_test.collada" mod. Then the actor viewer
can be run with _test.minimal + _test.collada, to see if it's working
correctly.
This was SVN commit r4690.
