[Breaking] 0.40 Add namespaced import React/* to headers

[ptmt]

Related: facebook/react-native@e1577df

Also requires updates in Example. So I guess, I left it here for those, who for some reasons want to update to RN@0.40.

[adrienbataille]

@ptmt Hi, can you please merge this PR? 0.40 is out already.

[jhampton]

Bumping the above PR

[avioli]

This is a weird version change. Why bump major version and the RC? Why include a version bump commit at all? My understanding is that pull requests should be from a branch that doesn't affect the version, thus master is not the best use case.

React Native advises imports to use angle brackets: #import <React/RCT...>, not quotes #import "React/RCT...". Both work though, just a matter of prioritisation - double quotes first checks local directory, and if it doesn't find a match moves to system headers paths, whereas the angle brackets skips directly to the system paths.

[ptmt]

@avioli You're right, as I said it was rush update (I forked and updated like 6-7 plugins). Now, when 0.40 is released it's time to make a proper pull request.