Made many changes to the way photos are displayed.

Display of an album is now a grid of the photos in it and will load automatically and async. It will only load enough to fill the screen and then when you scroll, it will load more. It also caches the images so it will only make a REST call once.

Showing a single image is now changed to use a View Pager that allows smooth horizontal scrolling of the images. It will load 3 right away with one on either side of the image you choose. As you scroll, it will load more with async calls and if you already loaded that image, it will just pull it back without another REST call.