Removing that dependency didn't take a lot of code, and fewer
dependencies are better

We don't need all the commandline stuff we when're designing it for
running as a docker container app. If we want to we can reintroduce the
command syntax as a separate bin later

This should make it easier (possible) to query for expired images

I also moved over to passing borrows of the time. This should have been
a separate commit, but i forgot.