Translated wagtailredirects app into Chinese language.
Translated wagtailsnippets app into Chinese language.
Translated wagtailsearch app into Chinese language.
Translated wagtaildocs app into Chinese language
Merge pull request #109 from lihan/chinese-translation

Translated wagtailredirects, wagtailsnippets, wagtailsearch and wagtaildocs to Chinese lanuage