PlaceObject. Created a default AccessController that is slightly more strict
than the CrowdServer-wide default in that it only allows place occupants to
subscribe to a PlaceObject (a motivated and resourceful player could otherwise
listen in on place chat everywhere in the game if they so desired; with a
custom client, of course).
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4079 542714f4-19e9-0310-aa3c-eee0fc999fb1
Michael Bayne
0699eb3d1c