#56 Websockify in the server library

[Zerjillo]

As some web clients are going to be developed it could be interesting to add the possibility of natively websockify the server (to avoid launching websockify as a separate process). This should be easy to do with https://github.com/jribble/Java-Websockify

[Richard van Nieuwenhoven]

better to use https://tyrus.java.net/ there implementation is the comming standard and a better match for i4j. a client connection should also be implemented (just as the url connection)

[Richard van Nieuwenhoven]

server and client now accept websocket connections