* Added default assets for avatar appearance
* Fixed default heightmap loading
* Removed ugly appearance hacks and replaced with hardcoded but not so ugly default assets
* Simplified the inventory classes to work with the libomv inventory system rollback
git-svn-id: http://libopenmetaverse.googlecode.com/svn/trunk@2135 52acb1d6-8a22-11de-b505-999d5b087335