Account Tracker / Hill Lists / Meter Readings

Fixed a number of issues introduced by iOS 7, specifically rotation glitches (on both the iPhone and iPad), and swipe between meters not working if you swipe the graphs (iPad only). I have also improved the text displayed when you touch and hold the graphs to show things like the day of the week.

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.