commit messages:

- feat: (new feature for the user, not a new feature for build script)
- fix: (bug fix for the user, not a fix to a build script)
- docs: (changes to the documentation)
- style: (formatting, missing semi colons, etc; no production code change)
- refactor: (refactoring production code, eg. renaming a variable)
- test: (adding missing tests, refactoring tests; no production code change)
- chore: (updating grunt tasks etc; no production code change)