[READY] Image Viewer Navigation

- [x] Keyboard (left, right)
- [x] Mouse
- [x] Swipe
- [x] URL hash

![Coding in the morning](http://24.media.tumblr.com/ddf33b6255458c2098773299352b0d55/tumblr_myp9tdieAE1qdlh1io1_400.gif)