Merging from master#7

Merged

gspencergoog merged 52 commits intofix_popfrom

Jul 21, 2017

Commits on Jun 15, 2017

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Removed example.
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Commits on Jun 21, 2017

Merge pull request #4 from flutter/master
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Commits on Jun 26, 2017

Merge pull request #5 from flutter/master
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Commits on Jul 1, 2017

Merge branch 'master' of https://github.com/flutter/flutter
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Commits on Jul 18, 2017

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Commits on Jul 21, 2017