Rebuilt the Extension so that it is more consistent with tracking Ads and muting/hiding them.

Improved show/hide logic for the video player when ads are playing, so that it's more consistent.
Improved the ad-detection on page-load, so that ads are muted/hidden sooner.

Contributor @kwyntes added the ability to visually hide the Twitch video player once ads start playing. Simple helper text will display in it's place while ads are playing. Once the Ads stop, the video player will re-appear and resume normal functionality.