All projects (and namespaces) should start with an "ATx" prefix, having
a capital "AT" and a lowercase "x".

All outputs of any kind of duration should be using a human readable
variant of the time span.

Fixes #25

This allows us to re-use the summary method in other tools like the tray
application.

CreateNewDirectory, CheckForDirectory and CollectOrphanedFiles.

Fixes #24