Support Package, revision 13 (May 2013)

Changes for v4 support library:
 - Added DrawerLayout [1] for creating a Navigation Drawer [2] that can be pulled in from the edge of a window.
 - Added SlidingPaneLayout [3] widget for creating linked summary and detail views that appropriately adapt to various screen sizes.
 - Added ActionBarDrawerToggle [4] as a way to tie together the functions of DrawerLayout [1] and ActionBar [5].
 - Added ViewDragHelper [6] as a new common component for dragging views within a parent view.
 - Added ScrollerCompat [7] to provide Scroller [8] and OverScroller [9] compatibility support.
 - Updated ViewPager [10] to throw an exception if the associated PagerAdapteri [11] class is modified without a call to notifyDataSetChanged() [12].
 - Fixed an issue with ViewPager [10] children drawing sort order.
 - Fixed GestureDetectorCompat [13] to dispatch missing onSingleTapConfirmed(MotionEvent) [14] calls between tap timeout and long press events.

 [1] http://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html
 [2] http://developer.android.com/training/implementing-navigation/nav-drawer.html
 [3] http://developer.android.com/reference/android/support/v4/widget/SlidingPaneLayout.html
 [4] http://developer.android.com/reference/android/support/v4/app/ActionBarDrawerToggle.html
 [5] http://developer.android.com/reference/android/app/ActionBar.html
 [6] http://developer.android.com/reference/android/support/v4/widget/ViewDragHelper.html
 [7] http://developer.android.com/reference/android/support/v4/widget/ScrollerCompat.html
 [8] http://developer.android.com/reference/android/widget/Scroller.html
 [9] http://developer.android.com/reference/android/widget/OverScroller.html
[10] http://developer.android.com/reference/android/support/v4/view/ViewPager.html
[11] http://developer.android.com/reference/android/support/v4/view/PagerAdapter.html
[12] http://developer.android.com/reference/android/support/v4/view/PagerAdapter.html#notifyDataSetChanged()
[13] http://developer.android.com/reference/android/support/v4/view/GestureDetectorCompat.html
[14] http://developer.android.com/reference/android/view/GestureDetector.SimpleOnGestureListener.html#onSingleTapConfirmed(android.view.MotionEvent)