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
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
[jsx] Make sure we throw when we get XML namespaces

https://github.com/facebook/esprima/commit/aad8a2b798ca80342a744aac2869fc1feb0065dd
replaced XJSIdentifer with XJSNamespacedName for namespaced items, so we
need to adjust here accordingly.