README: add link to Netlify dashboard (google#964)

README: add link to Netlify dashboard (google#964)

CI: don't clean assets/vendor for local builds (google#940)

CI: don't clean assets/vendor for local builds (google#940)

Enable to pull in docsy as hugo module (google#871)

Enable to pull in docsy as hugo module (google#871)

Merge pull request google#826 from xiaoping378/master

update zh.toml and zh-cn.toml