Merge branch 'develop' of https://github.com/fritzy/SleekXMPP into sleek-merge

Conflicts:
	README.rst
	examples/IoT_TestDevice.py
	examples/disco_browser.py
	setup.py
	sleekxmpp/jid.py
	sleekxmpp/plugins/google/auth/stanza.py
	sleekxmpp/plugins/google/gmail/notifications.py
	sleekxmpp/plugins/google/nosave/stanza.py
	sleekxmpp/plugins/google/settings/settings.py
	sleekxmpp/thirdparty/__init__.py
	sleekxmpp/thirdparty/socks.py
	sleekxmpp/thirdparty/statemachine.py
	sleekxmpp/util/__init__.py
	sleekxmpp/xmlstream/xmlstream.py
	slixmpp/basexmpp.py
	slixmpp/plugins/xep_0004/stanza/form.py
	slixmpp/plugins/xep_0009/rpc.py
	slixmpp/plugins/xep_0050/adhoc.py
	slixmpp/plugins/xep_0065/proxy.py
	slixmpp/plugins/xep_0084/stanza.py
	slixmpp/plugins/xep_0202/time.py
	slixmpp/plugins/xep_0323/sensordata.py
	slixmpp/plugins/xep_0325/control.py
	slixmpp/plugins/xep_0325/stanza/control.py
	slixmpp/roster/single.py
	slixmpp/stanza/atom.py
	slixmpp/stanza/rootstanza.py
	slixmpp/test/slixtest.py
	slixmpp/util/sasl/mechanisms.py
	slixmpp/version.py
	slixmpp/xmlstream/stanzabase.py
	tests/test_stanza_xep_0323.py
	tests/test_stanza_xep_0325.py
	tests/test_stream_xep_0323.py
	tests/test_stream_xep_0325.py

slixmpp/plugins/xep_0030/disco.py

@@ -609,7 +609,7 @@ class XEP_0030(BasePlugin):
         """
         self.api['del_features'](jid, node, None, kwargs)
 
-    def _run_node_handler(self, htype, jid, node=None, ifrom=None, data={}):
+    def _run_node_handler(self, htype, jid, node=None, ifrom=None, data=None):
         """
         Execute the most specific node handler for the given
         JID/node combination.
@@ -620,6 +620,9 @@ class XEP_0030(BasePlugin):
             node  -- The node requested.
             data  -- Optional, custom data to pass to the handler.
         """
+        if not data:
+            data = {}
+
         return self.api[htype](jid, node, ifrom, data)
 
     def _handle_disco_info(self, iq):