feat (new feature)
fix (bug fix)
docs (changes to documentation)
style (formatting, missing semi colons, etc; no code change)
refactor (refactoring production code)
test (adding missing tests, refactoring tests; no production code change)
chore (updating grunt tasks etc; no production code change)
for more see http://karma-runner.github.io/0.10/dev/git-commit-msg.html