merges
Ignore .xcuserdata
silence compiler warnings when implementing custom settings store (by @mman)
Fixed removal of NSUserDefaultsDidChangeNotification

close #234
Sample App: iOS 7 modifications

close #224
Support ShortTitles for Multi Value Elements (introduced in IOS 5.0)

thx @meizy
Fixed warnings and modernized build settings
Merge branch 'master' of git://github.com/futuretap/InAppSettingsKit
Fixed issue with CUICatalog: Invalid asset name supplied: (null), or invalid scale factor: 2.000000
Merge branch 'master' of git://github.com/futuretap/InAppSettingsKit