#385 - added activity indicator to WPNUXMainButton
Merge branch 'develop' into issues/385-remove-nux-modals
Removed modal activity indicators from LoginViewController
Removed modal activity indicators from JetpackSettingsViewController
Fixed tap on Sign In button in JetpackSettingsViewController when keyboard is visible
Added a sign in status label to show activity during long sign in process
Merge branch 'develop' into issues/385-remove-nux-modals
Removed modal activity indicators from CreateAccountAndBlogViewController
Removed deprecated methods from CreateAccountAndBlogViewController
Fixed issue where creating an account would perform method twice
Reorganize AppDelegate, add notifications manager

- Defer appropriate tasks to the background queue

- Add notifications manager class to declutter the AppDelegate

- Remove iOS 6 appearance customization code
Make WPMobileStats track first launch

- Updates NotificationsManager and AppDelegate

- Remove unused or soon to be unused (BetaUIWindow) notifications
#616 - fixes NUX screen flash before NUX is dismissed
Fixed deployment target and xctool builds

xctool was trying to build for iOS6 because the WordPressTest target had
an older target deployment
Updated tests to iOS7 target
Cleanup headers in AppDelegate

- Handle side-effects of doing so in other files
#618 - prevent account creation method firing twice during NUX
Added validation for site when creating an account
Use AFNetworking for upgrade check
#585 - Added HockeyApp SDK to project and conditionally configured based upon INTERNAL_BUILD parameter being present