add user login and channel pages using twitch and redis

Allows anyone with Twitch to login to OverRustle and setup their own channel page for hosting strims.

You'll need to use Composer to install the redis library for PHP.

Also, copy config.sample.php to config.php and configure the Twitch auth parameters.

Contact me if there are any ![](https://raw.githubusercontent.com/destinygg/website/master/scripts/emotes/emoticons/DANKMEMES.png)s