Socketio clean

Most importantly, I've updated the Browser Quest code to use socket.io instead of stuff related to "worlize" and "miksago". It is possible to clone it down, run npm install -d and node server, and be running locally.

BrowserQuest code itself no longer needs to handle websocket/transport fallback because scoket.io handles that.

BrowserQuest does not need to force sendUTF over send because socket.io sends everything by UTF-8.

Note that WS.socketioConnection._connection from /server/js/ws.js is now a socket.io Socket.