Outbound connection pool for Websockets

[xaviervia]

Currently, a websocket client connection is opened and closed for every Dispatch to a inbound websocket JSTP node. The proposal is to optimize by pooling outbound connections and persisting them.

[xaviervia]

It seems that the main issue here is to escape the EventMachine's event loop in order to be able to continue processing in the client. A suggestion that looks promising is to run EventMachine in a thread.