Release 0.4.0 preparation (google#1078)

Release 0.4.0 preparation (google#1078)

Prepare release v0.3.0 (google#1043)

Update hugo module to v0.3.0

Prepare release v0.3.0 (google#1043)

Update hugo module to v0.3.0

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)