Remove the ActionBar overlay in the EpisodeDetailsActivity.

A couple of things had me do this:

1) The ActionBar items, when using the "light" theme, are difficult to notice with the overlay.
2) I think it looks much nicer, especially with the new PagerSlidingTabStrip library.

I tried looking for a reason to keep the overlay, but didn't notice anything explicit. Did you have one in particular or was it just for aesthetics?

[Here's a screenshot, as per his majesty](https://dl.dropboxusercontent.com/u/2301775/device-2013-07-31-205801.png)