added docs for installing vagrant dev environment

I needed to run these commands to get things to work in the local environment

I have not verified that the `ssh-copy-id` is still needed.

Are there other steps I should be running?

Thanks
> not sure this is the line we want here.

My reaction exactly. I believe @kbrock was seeing multiple red herrings due to the testrunner bug that we found in the vagrant setup yesterday and we can safely close this without merging