* rename getid to negotiate
* also change SSE and Long Polling to require a pre-established connection
* disallow changing transports mid-connection; return a 400 response if the user attempts to do so
* Need a separate set of primitives to handle messaging
* Using Channels (not Pipelines!) to provide the data flow for messaging
* All transports are now "message" based transports
* Added an adaptor to convert message-based transports to serve
streaming endpoints
Andrew Stanton-Nurse
Andrew Stanton-Nurse
DamianEdwards
David Fowler