added permissions module, basic admin selection, moved around some code:
- permissions added, defines player permissions levels (default, mod, admin)
- added player leaves event (still needs to set new admin if admin leaves)
- moved getting player name colored to players.galaxy
- moved engine version constants to engine.galaxy (needed for \info command)

misc changes:
- made @spawn get unit type from string via UnitGetType(string s) function instead of catalog search
- added actor visuals to @say