UI fix for iOS 7.

[FIXED]     New ActionSheet doesn't deal well with spacing in items.
[FIXED]     UI now works on iOS 7.
Merge branch 'master' into ios7
Fix storyboard inconsistencies.

[FIXED]     Storyboard had multiple resource references with the same name.
Bump USM.
Merge branch 'master' into ios7

Conflicts:
	MasterPassword/ObjC/iOS/MasterPassword-iOS.xcodeproj/project.pbxproj
Theming for iOS 6, updated status hiding and more exception handling.

[ADDED]     More verbose log printing when trace enabled.
[ADDED]     More exception handling on application launch; we can't allow any of this to keep us from being able to open the emergency generator.
[UPDATED]   Only apply UI theming on iOS 6-.
[ADDED]     Modern way of hiding the status bar on iOS 7.
More robust migration.

[FIXED]     Better recovery from failure to migrate local store.
[FIXED]     Ability to migrate outdated local store models.
Log VC, iCloud toggling, iOS 7 fixes.

[UPDATED]   Show users and sites in cloud stores of log VC.
[ADDED]     Ability to turn off iCloud if corruption happens.
[ADDED]     When switching iCloud on/off, provide user the option to migrate his current sites.
[ADDED]     Ability to get to settings & logs from unlock VC.
Improved cloud store enumeration.

[ADDED]     Stores now enumerated in a TVC.
iOS 7 cloud loading.
Fixed queuing of password generation logic.

[IMPROVED]  Removed password logic out of MPEntities so that it can be backgrounded without relying on the persistence layer staying up.
[IMPROVED]  Some workload removed from the main thread.