Simplify and update XEP-0033 to latest plugin format.

sleekxmpp/plugins/xep_0033/__init__.py

@@ -0,0 +1,20 @@
+"""
+    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_0033 import stanza
+from sleekxmpp.plugins.xep_0033.stanza import Addresses, Address
+from sleekxmpp.plugins.xep_0033.addresses import XEP_0033
+
+
+register_plugin(XEP_0033)
+
+# Retain some backwards compatibility
+xep_0033 = XEP_0033
+Addresses.addAddress = Addresses.add_address