Release 0.8.2.0

1. ButtonCallback has been deprecated. MaterialDialog.Builder now has onPositive(), onNeutral(), onNegative(), and onAny() methods that allow you to receive callbacks for all or specific action buttons. These methods all use an interface instead of an abstract class for the callback, so classes can now implement the interface.
2. Lots of improvements and fixes to MaterialSimpleListAdapter and MaterialSimpleListItem. There's some new features and the layouts were much improved. See the Simple List Dialogs section in the README for details and examples.
3. The ColorChooserDialog now allows you to specify custom colors. See the Color Chooser Dialogs section in the README for details and examples.
4. The MaterialEditTextPreference will no longer receive two preference changed events when you press the positive action button.
5. The FolderChooserDialog now respects the value specified for the choose button in the Builder.
6. The library no longer forces the use of Support Library v23 in your apps, it will work with older versions.
7. Simplified the sample, especially MainActivity, using ButterKnife.

The library has passed 4,000 stars, thanks everyone!