Work on iOS 7 support.
Apply a more subtle shadow on iOS 7.
Navigation bar icons for iOS 7.
More icon sizes for iOS 7.
Increase number of saved items to 500 per feed.
Improve reliability of item updates.
Tweak feed popover layout.
Adapt reading preferences to iOS 7.
Updated submodules. Additional iOS 7 tweaks.
Updated iPhoneMK submodule.