v2.0.6-pre1

This update adds the AISpaceship, Fleet and Vehicle globals.
Also added is the ability to deserialize old-format scene files (pre-Beyond). MBINCompiler will automatically detect if the scene file is an older one and if so add a CRC32 hash of the name to the NameHash field. This way old scene files can be updated very easily!
Note that the game itself doesn't use a CRC32 hash for the NameHash field, the hashing algorithm is unknown. However I have found that the hash doesn't actually seem to be checked anyway, so this hash is really just to have something there that is unique.