Summary:
The new Handling Touches guide provides an overall view of how touches can be handled. It is meant to be a higher level discussion of basic touch handling, e.g. "how do I implement a button?". The existing Gesture Responder System guide has been moved to the end of the docs and is still available for reference when building custom gesture handlers.
Reference: #8160
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Closes https://github.com/facebook/react-native/pull/8299
Differential Revision: D3469681
Pulled By: JoelMarcey
fbshipit-source-id: 3bc18e759b26c2d5c141b626acb433c5e973cef0