v4.0.0

• Added FilterAsyncTask to asynchronously load the list (This might not work well and binding is excluded from Async).
• Enabled Search filter through updateDataSet method (Note: as the example is made, the search regenerate the list!).
• Included some ItemAnimators from https://github.com/wasabeef/recyclerview-animators
  (in the example SlideInRightAnimator is used), but all need to be adapted if used with Support v23.1.0.
• Included and customized FastScroller library from https://github.com/AndroidDeveloperLB/LollipopContactsRecyclerViewFastScroller
  My version has FrameLayout extended instead of LinearLayout, and a friendly layout.
• Added SwipeRefreshLayout, just an usage example.
• Use of Handler instead of TimerTask while Undo.
• FlexibleAdapter can now return deleted items before they are removed from memory.
• SelectableAdapter.selectAll() can now skip selection on one specific ViewType.
• Adapted MainActivity.