Prepare next development version.
Drag a list item which is really pointed

Currently, drag and drop handler chooses a list item
which is located at some moved point.
But it has little difference from the point at touch down.

This pull request fixes DragAndDropHandler to drag a list item
which is located at touch down.
Return a correct child count for StickyListHeadersListViewWrapper; Unwrap StickyListHeaders item before trying to find ListViewAnimations' tags from it
Bring project versions up to date
Fixed example app in Lollipop
Renamed SwipeUndoTouchListener.dimissPending() -> SwipeUndoTouchListener.dismissPending().
Made StickyListHeadersListViewWrapper.unwrapItemView(View) private.
Merge branch 'pr/n275_harri35' into dev
Don't use raw values at all.
Merge branch 'pr/n264_tyfkda' into dev
Updated gradle build version
SwipeTouchListener.dismiss(int) now immediately dismisses the item without flinging it sideways. Fixes #245.
Renamed SwipeTouchListener.fling(int) to SwipeTouchListener.swipe(int).
Throw a more explaining exception when trying to swipe a header or footer view using SimpleSwipeUndoAdapter. Fixes #277.
Also throw the exception in getPrimaryView.
Use NineOldAndroids library to make Drag and Drop and the example app to work on API 8 or higher.
Fix running example app on Emulator without Google Play Store.