Exemples (https://seesparkbox.com/foundry/semantic_commit_messages):
- feat (new feature)
- fix (bug fix)
- docs (changes to documentation)
- style (formatting, missing semi colons, etc; no code change)
- review (code review)
- refactor (refactoring production code)
- test (adding missing tests, refactoring tests; no production code change)
- chore (updating grunt tasks etc; no production code change)