Summary:
Ensure all `props` have documentation. Add more details to current `props`.
Provide more information to the API in general.
> Would like to try to integrate the React Native Web Player for the initial
> example, but not right now.
Closes https://github.com/facebook/react-native/pull/8341
Differential Revision: D3475105
Pulled By: caabernathy
fbshipit-source-id: 00ad30b2359831740715517278bec1d0231e089d
9b9df78e28