Add branch label as a CSS class to the corresponding DOM element

[mpsq]

This enable custom styling based on the branch name.

Example: when you have a big list of projects you might want to add a:

.branch-label:not(.master) {
  color: orange;
}

Class to your styles.less to automatically see which project is on a [branch] and which project is on [master].

[subesokun]

Great idea! I'll try to prepare a release by this weekend :)

[mpsq]

That's great! Thank you :)

[subesokun]

FYI I've changed the implementation a little bit to make it more generic :) See https://github.com/subesokun/atom-tree-view-git-status#css-branch-styling