Add initial XEP-0084 support.

It does not auto-retrieve and store avatars yet, but everything is there
to do so.

sleekxmpp/plugins/xep_0084/__init__.py

@@ -0,0 +1,18 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+from sleekxmpp.plugins.base import register_plugin
+
+from sleekxmpp.plugins.xep_0084 import stanza
+from sleekxmpp.plugins.xep_0084.stanza import Data, MetaData
+from sleekxmpp.plugins.xep_0084.avatar import XEP_0084
+
+
+register_plugin(XEP_0084)
+
+