Make pushers use the event_push_actions table instead of listening on an event stream & running the rules again. Sytest passes, but remaining to do:

* Make badges work again
 * Remove old, unused code

synapse/push/pusher.py

@@ -0,0 +1,10 @@
+from httppusher import HttpPusher
+
+PUSHER_TYPES = {
+    'http': HttpPusher
+}
+
+
+def create_pusher(hs, pusherdict):
+    if pusherdict['kind'] in PUSHER_TYPES:
+        return PUSHER_TYPES[pusherdict['kind']](hs, pusherdict)