Removed websocket and longpoll examples to focus on sockjs example
Fix bug of sending POST data too early
Adjusted SockJS connection url creation in js code
Setup pom to use later version of Jetty - run using mvn jetty:run
Update pom to use 4.0.0M2 version of Spring
Added spring-messaging dependency
Updated pom to use property for spring version (easier change in future)
Updated codebase to use M2 and messaging queues and STOMP
Add user login to allow for user queues