Server Feat: connection2w3cwebsocket

[formula1]

Your websockets do some good stuff but, for consistencies sake and perhaps some browserify action, I wanted to use the W3CWebsocket interface with a server connection. I had forked your project a while ago but I suppose I wasn't able to figure out how to get it done. Well, I got it done.

Notes

• connection2w3cwebsocket is a very simple function
• W3CWebSocket now inherits W3CWebSocketWrapper and much of the guts have been moved over there
• Right now, W3CWebSocket listens to the close event to cleanup it's client.
  • this covers client failure, close while connecting and normal closing
  • If ever a consumer decided to remove all event listeners for this, the client will not get cleaned up.
  • This is also the case for some of the connection close events. Hopefully, nobody does something silly
• I didn't know what to name W3CWebSocketWrapper
• I added some tests, effectively just copied the W3CWebSocket tests.
  • the server based W3CWebSocket doesn't emit an open event.
  • I considered doing a Promise.resolve() then opening it but I'm not sure if its relevant
  • I'm definitely open to to implementing one if that is important it really should be easy