build 0.12.12

updated guide/components

暂时注释掉后面版本的图片

Merge branch '0.12-zh' of github.com:lvdou/vuejs.org into 0.12-zh

edits

Merge pull request vuejs#34 from vuejs/lang-zh

fix unit test example code

Merge pull request vuejs#49 from mickelus/patch-1

Corrected a minor typo