Handle most CStr8/CStrW conversions via UTF-8 instead of effectively
assuming Latin-1.
Return UTF-8 strings from Xeromyces API.
This was SVN commit r8929.
Replace almost all texture uses with calls to the new system.
Add some anistropic filtering to terrain textures.
Let Atlas load terrain texture previews partly-asynchronously by
polling.
Fix inefficient texture colour determination for minimap.
Remove unused global g_TerrainModified.
Change GUI texcoord computation to be less efficient but to cope with
dynamic texture changes.
Fix GUI renderer effects leaving bogus colour state.
This was SVN commit r8099.
