Remove duplicate code from XMLConverter.
Remove duplicate code from XMLConverter.

Removed Lod completely because it had the same flags as MeshUpgrader,
but with different implementation. Somebody wasted time writing duplicate code.

RealityFactory/ogre,OGRECave/ogre,OGRECave/ogre,RealityFactory/ogre,paroj/ogre,paroj/ogre,paroj/ogre,RealityFactory/ogre,paroj/ogre,OGRECave/ogre,RealityFactory/ogre,paroj/ogre,OGRECave/ogre,OGRECave/ogre,RealityFactory/ogre