Merge branch 'develop' into xep_0050_updates

# Conflicts:
#	tests/test_stream_xep_0050.py

sleekxmpp/plugins/xep_0050/adhoc.py

@@ -101,7 +101,7 @@ class XEP_0050(BasePlugin):
                          self._handle_command))
 
         register_stanza_plugin(Iq, Command)
-        register_stanza_plugin(Command, Form)
+        register_stanza_plugin(Command, Form, iterable=True)
 
         self.xmpp.add_event_handler('command_execute',
                                     self._handle_command_start,
@@ -425,12 +425,25 @@ class XEP_0050(BasePlugin):
 
             del self.sessions[sessionid]
 
+            payload = session['payload']
+            if payload is None:
+                payload = []
+            if not isinstance(payload, list):
+                payload = [payload]
+
+            for item in payload:
+                register_stanza_plugin(Command, item.__class__, iterable=True)
+
             iq.reply()
             iq['command']['node'] = node
             iq['command']['sessionid'] = sessionid
             iq['command']['actions'] = []
             iq['command']['status'] = 'completed'
             iq['command']['notes'] = session['notes']
+
+            for item in payload:
+                iq['command'].append(item)
+
             iq.send()
         else:
             raise XMPPError('item-not-found')