Added cross-repo branch automation

Closed Beta: Opt-in by request

If you are using the Fork and Branch Git workflow, you now can increase your team's efficiency by automatically advancing issues in your primary repo for newly created branches in your forked repos. This will help your devs stay at the command line and keep your PMs informed of issues that have begun development work.

If you are interested in using this feature, please reach out at andrew@codetree.com