Implemented SignalR and changed authentication

Added SignalR library and code. Will use for lots more data updates in
the future.
Changed the Facebook auth token handling, instead of custom HTTP header,
I had to change into a cookie to ensure WebSocket (SignalR) would
authenticate the calls.
The code is somewhat messy in the current state, and the modifications
to use Cookie instead of HTTP header on the AJAX call has not been fully
cleaned up. If you see an Hello World alert dialog, then the SignalR
code works ;-)