hub github helper

[Chris MacNaughton]

> That is interesting, I use the same configuration: origin is me, 
> upstream is the parent fork. I didn't realize this was uncommon.
>
According to Github, this is the normal, expected practice: 
https://help.github.com/articles/fork-a-repo/#keep-your-fork-synced
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/juju-dev/attachments/20160804/45df5798/attachment.html>