Add an alternative to Basic Authentication so websockets can access phoenixd from a browser

[remyers]

I am working around the basic authentication requirement for websockets with a python shim so that I can access the websocket from javascript in a local browser. It would be nice if there was an option to do basic authentication via the url instead of the http header. For example:

ws://127.0.0.1:9740/websocket?auth=<http-password-limited-access>

Current browsers do not support passing custom header information to websockets, and they are unlikely to ever allow it based on this SO post: https://stackoverflow.com/questions/4361173/http-headers-in-websockets-client-api

[tsmith123]

Yeah this would be useful for local webpages and for testing.

[remyers]

Fixed by #95