[JM-761] [JM-769] Some work done on roster integration.  Needs to be better.  Need to handle status.  Need to figure out if ymsg.support is really worth having.

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk/src/plugins/gateway@4536 b35dd754-fafc-0310-a699-88a17e54d16e