Keen Modding Live - Personal tags

I realized after implementing tagging yesterday that letting everyone affix arbitrary tags to everyone else's levels could conceivably go poorly. Attaching a normal tag now requires owning both the level and the tag; attaching an open tag still just requires owning the level. At creation, tags can be made "personal," in which case they can again be affixed by their owner to any level, but they will not be visible to any other non-admins.