v0.7.0

• clean up karma output from console.*() 8171d9f
• add git pre-commit hook
• add html banner
• add npm run test-build
  • test gulp build
  • if build/dist is under git management, git stash/unstash before and after testing
• add npm run test-build to Travis CI
• add git pre-push hook (with npm run test-build)
• fix gulp sass: better error handling 500d695
• update some outdated devDependencies (add badge)
• update README.md

Changelog : v0.6.0...v0.7.0