Boxen: Allow provisioning of uncommitted changes

[radeksimko]

Have a look if boxen has any option how to force it to not ask

Would you like to run Boxen anyway, without the latest updates? [y/N]

and/or automatically answer y.

==> boxen: --> Skipping auto-update, because you've got uncommitted changes:
==> boxen:
==> boxen:  M manifests/site.pp
==> boxen:
==> boxen: Since you've got some uncommitted changes to those files, I'm
==> boxen: going to take the safe road and not automatically update anything.
==> boxen: If you're actively working on some Boxen, maybe you'd like to
==> boxen: switch to a branch, rather than working on master? This way I'll
==> boxen: know that you're trying something new, and won't do things like
==> boxen: automatically update, or submit issues, while you're making
==> boxen: changes. It makes everyone's life a bit easier ❤
==> boxen:
==> boxen: Now, if you *weren't* expecting any changes, here's how to get
==> boxen: back on the golden path:
==> boxen:
==> boxen:   cd /opt/boxen/repo
==> boxen:   git reset --hard origin/master
==> boxen:   boxen
==> boxen:
==> boxen: For more info on how the simple git-based updates work, have a gander at
==> boxen: https://github.com/boxen/our-boxen/blob/master/docs/updates.md
==> boxen:
==> boxen: Would you like to run Boxen anyway, without the latest updates? [y/N]
==> boxen: