This is the Facebook assignment for week 4
Time spent: 10 hours
####Completed User Stories:####
- Tapping on a photo in the news feed should expand the photo full screen.
- Tapping the Done button should animate the photo back into its position in the news feed.
- On scroll of the full screen photo, the background should start to become transparent, revealing the feed.
- If the user scrolls a large amount and releases, the full screen photo should dismiss.
- Optional: The full screen photo should be zoomable.
