UPDATE ALL THE DEPS.
Update a test script to use parser gem.
Try to avoid clobbering file permissions.
Handle filenames with spaces -- just in case.
Produce more informative output, and don't time how long it takes to enumerate files.
Begin abandoning our approach in favor of the one presented by the parser gem.

Leaving test cases and one class for the sake of migration notes.
Use GNU Parallel to make this less painfully slow.
Skip a few things we ought not to be touching.
Add a proper tmp dir.
*Use* the proper tmp dir.
More stuff to ignore during test runs...