Update 2012-11-19-ns_enum-ns_options.md
Merge pull request #4 from metadao/patch-1

Update 2012-11-19-ns_enum-ns_options.md
Merge branch 'zh-Hans' of github.com:NSHipster/articles into zh-Hans
add translation for article - uialertcontroller
add translator
translation for `Swift Comparison Protocols`
Merge pull request #222 from croath/zh-Hans

Translation for a new articles: `Swift Comparison Protocols`, `uialertcontroller`