[feature request] Customise commit message

[jmatsushita]

Hi there,

It would be nice to be able to customise the beginning of the commit message. And I just saw that the @octoblu fork by @sqrtofsaturn actually does this in its v1.6.1

I'm creating a pull request!

Jun

[JamesMessinger]

Thanks! Great new feature! Merged it like a boss. ;)