Bug fixes

Thanks for the big reports, we have some big fixes with the B.O.S.S. unit.
- B.O.S.S. can now be spawned by the Spawner
- B.O.S.S. can now be disabled in "disable units"
- Units placed on B.O.S.S.  can now be saved 
- Fixed the location of the B.O.S.S.  launcher
- AI mode switch for B.O.S.S.  now works as intended