Merge branch 'master' into Hitcents
New images to replace "record" buttons on iOS 6
Temporary back button fix for iOS 7

Added iOS 7 boolean value
Updated non-retina images
Added images for iOS 7
Updated ignore list
Renamed image files to match previous names
Merge branch 'Hitcents' of https://github.com/xamarin/prebuilt-apps into Hitcents
Updated tab icons for iOS 7

Added images to project file
Added a Theme.ToiOS7Path() method
TabBar and Theme changes
Status bar text color & extension method for UIColor
Let XCode 5 upgrade the storyboard
Assignment cells updated

Fixed status bar color on couple more screens
Updated record (play/pause) button
Toolbar shadow on assignments
Removed background image from TextButton
Updated fonts in app, cleaned up Theme
Moved code in assignment cell to AwakeFromNib()

Added iOS 7 styles
Changes to dropdown button
Added colored rectangle "statusView" to the right of cells on assignments