two new items...
https://github.com/keyanr/popcorn-js/commit/f4dd20af8e27ef2c1a6823749669e69aa8cfdebe
this can change the page's background color
there are many video website have "light off" feature, it can make the background into a dark color in order to make visitor more comfortable


https://github.com/keyanr/popcorn-js/commit/11ec0d848bfb6709d0c6c1330709e43d7be58a78
this add a tiresome feature, a popup window will be showed when user wants to pause the play, however this can often be found for adv.
it has a bug for now, if the play is already pause and click again to make it play, the popup window will still appear.