Feedback: Removed FeedbackRestServlet. Modified keys on FeedbackEvent. Expanded the feedback constants to fully explain what type of feedback they are.

Removed MessageRestServlet, use RoomSendEventRestServlet instead. Updated cmdclient, tests and webclient. All appears to work.

Renaming: /im/sync >> /initialSync. /rooms/$roomid/members/list >> /rooms/$roomid/members. /rooms$roomid/messages/list >> /room/$roomid/messages. Updated cmdclient, tests and webclient.

Conflicts:
	synapse/api/auth.py
	synapse/handlers/room.py
	synapse/storage/__init__.py

Added basic in-memory REST transaction storage. Only the latest transaction for a given path/access_token combo is stored in order to prevent storing ALL request/response pairs.

URL renaming: Room state keys now use the format /rooms/$roomid/state/$event_type/$state_key. cmdclient: Fixed double urlencoding on leave command. Stream from the END since START now produces an error on /events.