Re: 'git log' doesn't keep log of un-removed and then renamed directory

I should add: to make this work in that future smarter
`git log` command, be sure to:

 1. commit the un-removal first; then
 2. commit the rename (you can just `git mv` the
directory and commit)

so that the future smarter `git log` has an easy way of
finding this.  Ideally, it would find this even without that,
but having all the files / sub-trees have identical hash IDs
will make this much faster and easier.