Give a UIAccessibilityTraitSelected to the selectedButton

Currently, the selected date is the calendar view doesn't have the UIAccessibilityTraitSelected trait. It affects VoiceOver accessibility and testing using accessibility traits.

This change ensure the selected date always has the UIAccessibilityTraitSelected trait when displayed.
Set the current locale on all of the test app calendars.
Merge pull request #15 from square/locale-in-test-app

Set the current locale on all of the test app calendars.
Merge pull request #13 from kemenaran/uiaccessibilitytraitselected

Give a UIAccessibilityTraitSelected to the selectedButton
scrollToDate:animated: implementation.

This method allows the consumer to scroll to a given date month
instead of always starting in the firstDate month. Also allows to
programatically move the calendar view to a desidered date, either
animated or not.
Update TestApp to showcase scrollToDate:animated method.

The TestApp firstDate is one year in past, but the scroll is set to
today month after the views did layout.
Merge branch 'scroll-to-date' of git://github.com/drodriguez/objc-TimesSquare