Merge changes from master into Gatsby branch#10853

Merged

bvaughn merged 31 commits intofacebook:gatsbyfrom acdlite:gatsby

Sep 27, 2017

+875-432

Commits on Sep 22, 2017

Update changelog for unreleased 16.0 changes (facebook#10730 )
flarnie
authored
Fixes facebook#9667 : Updated createTextInstance to create the text node on correct document (facebook#10723 )

kenotron
authored and
sophiebits
committed

Commits on Sep 24, 2017

Record sizes
gaearon
committed

Commits on Sep 26, 2017