Update Java Web Sockets Dependency

[knocknarea]

@yasserf

Is there any chance you can update this library to use

Java-WebSocket 1.3.7 or later

https://github.com/TooTallNate/Java-WebSocket/tree/v1.3.7

I've tried to update my dependencies to get around a 100% CPU issue and unfortunately this library uses java_websocket/drafts/draft_10, which dropped out after 1.3.4

Also EndpointFactory is package private and so I cannot supply my own!