Updated WordPress-iOS-Shared,  WordPressCom-Stats-iOS, and  CTAssetsPickerController Cocoapods

Title basically has it.

* The Shared pod update contains the fix for #1622 as well as the inclusion of UIImage+Util category (it has been removed from the WordPress-iOS project).

* The stats pod now uses:  s.dependency 'WordPress-iOS-Shared', '~> 0.0.1'

* CTAssetsPickerController update contains a small fix.