Commit (46e7266):
Add code to import diffuse for H1E3 meshes
Changed how we set prerelease assets in the asset cache. Now we avoid including the group folder name in the tag reference when writing the file to disk. This path addition stays in memory.
Change how the mode->mod2 conversion is done. In case someone wants to disable it to write Xbox versions of the tag.
Import bitmaps for meshes during H1E3 imports. Still need to look into fixing orientation for the images