Version 2, alpha 1

[afollestad]

1. This library will be more opinionated. Not every feature request will be implemented.
2. Completely rebuilt everything. There is no longer any Java code in the project, just Kotlin.
3. There is no longer a separate Builder class, it's all-in-one.
4. All main classes exist in the core module, the extension modules take advantage of Kotlin
   extensions to append functionality to it (such as input dialogs, color dialogs, etc.). This way,
   you can include only what your app needs.
5. The use of the neutral button is deprecated to discourage use, see the
   newer Material guidelines.
6. There is no longer a progress dialog included in library, since they are discouraged by Google,
   and discouraged by me. You should prefer a non-blocking inline progress indicator.
7. No dynamic color support, your dialogs will match your app theme. I will be making sure
   Aesthetic works correctly with this library if you really
   need dynamic theming.
8. Probably other things.