Account Tracker / Hill Lists / Meter Readings

Fixed a number of issues introduced by iOS 7, mainly around iCloud access and syncing. Also added a workaround for an iOS bug that caused a crash when entering the budgets or reports tab.

Note that for users running iOS 7 and above, Bluetooth is no longer supported. Apple have deprecated the way this works, and I need to completely rewrite it. Since this was only added as a way to copy files between devices and the app now supports both iCloud and Dropbox, I am not planning to do this.