add chinese translation for 01-why-react.md
fix some translation error
fix some translation error
Merge branch 'master' of github.com:rayqian/react

Conflicts:
	docs/docs/01-why-react.zh-CN.md
fix `(`
make translation better
add translation for getting-started.md
change some translation words
warn when shouldComponentUpdate() returns undefined
Update many npm dependencies

Sauce/connect related things need some more work and I didn't want to
figure those out right now.

Fixes #1701
Added example of objectOf usage in documentation.
Merge pull request #1712 from mathieumg/master

Added example of objectOf usage in documentation.
Clarify refs and setState callback documentation
Missing semicolon in TodoStore.js
Merge pull request #1713 from bmihelac/patch-1

Missing semicolon in TodoStore.js
Merge pull request #1513 from danielschonfeld/shouldcomponentupdate-boolean

Warn if shouldComponentUpdate returns anything other than true/false
Fugbix typo.
Merge pull request #1721 from whatthejeff/patch-1

Fugbix typo.
Merge pull request #1244 from rayqian/master

add chinese translation support
Don't export (undefined) React in main.js

Previously, this was throwing an error. It was unintentionally (I assume) introduced in fc5bb9c.

Test Plan: jest