Finale Beta v0.1.3+2

• The Last.fm API doesn't give images for certain requests, so the app has to do some extra work to get the images. Previously, this extra work was being done far more often than necessary, which was causing the Artists tab to slow the app down to a halt. This has now been fixed.
• Additionally, the result of the extra work is now cached. This will make artist images load pretty much instantaneously for every load after the first.
• Added a loading indicator to the bottom of the lists and grids.