added pretransformvertices postprocess step
bugfixes in the 3ds material system. transparency is now displayed correctly
Node view in the viewer display the local transformation matrix now
Fixed wrong directory name. "unused" renamed to "extra"
---> all is WIP ...
git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@50 67173fc5-114c-0410-ac8e-9d2fd5bffc1f