COMETD-560 - Allow multiple messages to be sent along with a /meta/connect.

Removed the restriction, the processing code was agnostic with
respect to this case.
COMETD-566 - Provide local and remote address for JSR 356 WebSocketTransport.

Server-side JSR 356 WebSocketTransport now looks up local and remote
address from user properties.
Renamed classes annotated with @Service so that they end with -Service.
COMETD-569 - NPE in AcknowledgedMessagesSessionExtension.queued().

Fixed by adding the listener as the last operation of the constructor.
Introduced ChannelId.getRegularPart() to ease implementation of
annotations.
Change the detection of a publish reply message by checking the
presence of the 'data' field rather than the 'successful' field.
Updated Jetty to 9.2.4.v20141028.
COMETD-571 - Implement explicit RPC API via service annotation.

Implemented @RemoteCall support in annotated services.
COMETD-572 - Implement explicit RPC API in JavaScript client.

Implemented cometd.remoteCall(method, data, timeout, callback).
Implementation based on service channels, with correlation based on the message id.