Xbox-webapi

* Gracefully fail on wrong account password
* Fix "ValueError: tui: Unexpected button pressed: Cancel"
* provider.lists: Correct headers, GET list works
* Titlehub: Support getting title history by xuid

* Fixing appdir (aka. token save location) creation on windows

* Removed python-dateutil dependency
* Add auth-via-browser fallback script
* Small changes

* Auth: Updated 2FA authentication to meet current windows live auth flow
* Auth: Redesigned 2FA authentication procedure
* Auth: Implemented xbox-auth-ui script (xbox.webapi.scripts.tui: urwid terminal ui)
* Auth: For password masking, getpass instead or raw input() is used
* Scripts: Default to appdirs.user_data_dir if no tokenfile provided via cmdline argument (see README)

* Extend **Gameclips** provider with title id filtering and saved clips
* Add **Screenshots** provider
* Add **Titlehub** provider

* Added **Userstats** endpoint
* Updated README