gr status column headers and long branch names

[shousper]

Hi, long time user, first time bug/feature report.

The recent additions to include the current branch name and remote status information have kind of ruined the gr status output for me.
Our branches are usually anywhere from 20-40 characters long. Sadly this means the output looks something like this:

~/Source/project-a          feature/ABCD-17000-banana 3 modified   [ahead 1, behind 4]@app
~/Source/project-b          master         Clean                     @lib

Could the output here automatically line things up in a more table-like layout, maybe it's also time to add some column headings?
The branch names could even be intelligently truncated if they're too long on a terminal window that isn't wide enough, likewise for the ahead/behind output.
If this stuff was configurable in the .grconfig it could make it easier to release the feature without forced adoption too ;)

Let me know what you think, cheers.

[mixu]

yeah I think making these configurable seems reasonable. I don't have the bandwidth to make that happen soon, but if you have a bit of time I'd be happy to accept a PR!