Kulag/KADR — pull request #13 by Kovensky (2012-10-08 11:41:36+00:00)
Title: Recheck files if their mtime changes

Also ignores files if their mtime is too new (which means they might
still be changing); currently 10 seconds.

This doesn't merge cleanly with the hash_only pull request, I can rebase
it if needed..