Merge pull request facebook#2724 from zpao/release-0.12.2 Release 0.12.2

Changelog, Readme updates for v0.12.1 

v0.12.0 - update versions in packages, react - update version in docs - npm shrinkwrap

Update version to 0.11.0 

0.11.0-rc1 

0.10.0 

update version for 0.10rc