Add /party KI Command

Usage: Players type `/party` to be warped to the party. Admins include a
link in point sceneobject parameter to set the warp information in the
vault. Supplying an invalid object (eg `x`) will cause the party to be
killed, disabling the command for players.
Merge branch 'master' into party-cmd

Conflicts:
	Python/ki/xKIChat.py
Fix /party issues...

- Change an empty string comparison to a more pythonic expression.
- Fix SpawnPoint mangling--we now link in at the correct spot!
Move /party code to "other commands"
Merge pull request #82 from Hoikas/party-cmd

Add Party Command.