Add documentation

[Peter-Schorn]

This looks like a really cool library, but you're shooting yourself in the foot by not adding proper documentation. Doing so would likely increase the number of people who use your library.

[Peter-Schorn]

For instance, does the content contained in the RefreshableNavigationView have to be wrapped in a list?

[Peter-Schorn]

And here's another question: what does the isDone variable represent?