Summary:
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> **Unless you are a React Native release maintainer and cherry-picking an *existing* commit into a current release, ensure your pull request is targeting the `master` React Native branch.**
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Closes https://github.com/facebook/react-native/pull/10413
Differential Revision: D4028108
fbshipit-source-id: 99a864dfda578d640f582b296583591415ba26cd
Summary: Move all JS to a js/ subfolder so we get some overview of this folder again.
Reviewed By: bestander
Differential Revision: D3542598
fbshipit-source-id: 7637133fe4152f4d39e461b443b38510272d5bc8
leeight
Pieter De Baets