v1.6.4
chore(release-scripts): split BranchPattern from BranchVersion
chore(bower/npm): use npm (not yarn) to publish
chore(code.angularjs.org/publish): push snapshot from jenkins master build
chore(yarn): rely on Travis built-in Yarn support, update Yarn in Jenkins
chore(travis): install grunt-cli globally to simplify scripts
style(*): fix `no-useless-escape` eslint errors
revert: chore(npm): Make require()-able as part of publish script