Summary:
This adds support for handling incoming deeplinks in a Sandy plugin, which can be done by using a `client.onDeepLink(deepLink => { } )` listener
Also generalized deeplinks to not just support strings, but also richer objects, which is beneficial to plugin to plugin linking.
Reviewed By: jknoxville
Differential Revision: D22524749
fbshipit-source-id: 2cbe8d52f6eac91a1c1c8c8494706952920b9181
f0c54667e0