Add colour coding on gitin branch command

[reobin]

The git branch -a command shows local branches in white, remote branches in red, and the currently checked out branch in green.

It think the gitin branch could make good use of that colour coding.

Thanks for what you're doing with gitin, it makes my everyday git flow a lot neater!

[isacikgoz]

Hey @reobin thanks! I will definitely consider this. Why don't we test in the next release?