Colons (:) are not allowed in scope name

[boroth]

I'd like to update the regex that's used in parseRawCommit() in git.js.

I have a few commits that aren't being added to changelog that aren't being detected because they're formatted as such:

fix(category:subcategory): My subject

I've updated locally for myself, here's the regex that I've added:

var COMMIT_PATTERN = /^(\w*)(\(([\w\:\$\.\-\*]*)\))?\: (.*)$/;

[stevemao]

Can you send a pull request with tests associated? Thanks

[stevemao]

Closing for #13