Summary:Use the new Navigation library to make the UIExplorer navigation more flexible.
Deep linking examples are coming soon (hint: we just need to convert URIs to UIExplorerActions!)
Reviewed By: javache
Differential Revision: D2798050
fb-gh-sync-id: c7775393e2d7a30a161d0770192309567dcc8b0c
shipit-source-id: c7775393e2d7a30a161d0770192309567dcc8b0c
Eric Vicenti