Reconsider whether it's totally necessary to remove and re-add...

[bryanhirsch]

...projects that originated in a site repo that are going to be managed as subtrees. Git subtree push and pull both work. But squash fails:

Can't squash-merge: 'projects/sixteenhundredheader' was never added.

I'm breaking some projects out of a site repo. I can't decide which is less disruptive and confusing for other people working in the repo. Long term, squash seems to really simplify things. But it sure would be nice to not have to remove and readd the project.