fix the copyright holder from matrix.org to OpenMarket Ltd, as matrix.org hasn't been incorporated in time for launch.

Represent user power level in a room by a red bar at the bottom of his avatar image. The width of this bar depends on the power level.

Change call signalling messages to be their own types of room events rather than room messages with different msgtypes: room messages should be things that the client can display as a unit message to the user.

Added waitForInitialSyncCompletion so that clients can know when they can access to the data retrieved by the initialSync Request

Adjusted webclient to use new state paths. Updated membership msg template to actually show the person invited. Factored out common membership functions in matrix service.

Reinitialize room when creating a RoomController so that we start off with a clean slate, as it expects/

When new invites come down, update the My Rooms list. Added hacks to make the display name a bit nicer (/im/sync needs to return room aliases / membership events better)

Store messages in $rootScope so they can be accessed from multiple controllers without duplicated storage for each. This also gives updates.

Added event handler service which.. handles events. More specifically, it $broadcasts events depending on their type, and does processing on events (shuffling keys, adding events to $rootScope so displays will automatically update, sending delivery receipts, and so on). Some of this logic was previously contained in the RoomController, which fails the moment you add >1 room into the mix, hence requiring a Service to handle events, rather than having each individual controller maintain their part of the world.