Xbox-webapi

* Major rewrite (thx hunterjm)
* Removed auth-TUI (text user interface)
* async via aiohttp
* Support full OAUTH2 flow
* Add new smartglass endpoint (xccs.xboxlive.com)
* Add new catalog endpoint (displaycatalog)
* Easier tests (ditch betamax)
* Add RequestSigner / SignedSession (thx socram8888)

* Update people.py - Added get friends by XUID
* CI / metadata changes

* Fix parsing of WindowsLive auth response

* Consider (User-)privileges of (XSTS) userinfo optional
* Fix: Always return bool for Property AuthenticationManager.authenticated

* Make property *authenticated* in AuthenticationManager check token validity
* Break out of windows live auth early if cookies were cached previously

* Implement convenience functions for Partner Service Authentication