Add Issue #3 Support for video episodes

The video episodes are hosted on Vimeo and YouTube so I have put them into a separate feed. The IGVideoPlayerViewController is just a UIWebView that loads the web page where the video is hosted. Video playback in landscape is supported, so I added landscape navigation bar background and button images. Downloading video episodes is not supported.
Support for portrait mode only
Remove isVideo method

If it ain't audio it's video.
Compressed image size