wokkel integration, part II

- disco client
- fallback handler (for unmanaged iq requests)
- software version (XEP-0092)

tools/memory.py

@@ -177,7 +177,3 @@ class Memory:
         if not self.params.has_key(namespace):
             self.params[namespace]={}
         self.params[namespace][name]=[value,type];
-
-    def registerFeature(self, feature, callback=None):
-        self.features[feature]=callback
-