Merge request for open PRs

[lpw]

Hi @keithwhor - hope you're still around - thanks for this nice graph software.

I've made a couple of compatible additions which I use - would be convenient to work out of your official repo instead of my fork.

https://github.com/keithwhor/UnitGraph/pull/4 https://github.com/keithwhor/UnitGraph/pull/5

Also would like to avoid conflicts for any other contributors coming along with PRs.

Let me know if you have any issues merging this PRs.

Thanks, -Lance.