Configuration via cli options

[inodentry]

Anything that can be specified via a config file should also be able to be specified/overridden via the cli.

This is important for scriptability, and to be able to use different parameters for each invocation of the program.

Also, users shouldn't have to write and maintain a config file. It's nice to be able to just specify what you care about on the cli and leave everything else to defaults. Be sure to have good defaults. :)