Passing unknown opts to lolcommits CLI should produce an error.

[mroth]

Lower priority CLI cleanup.

When an unknown opt is passed to lolcommits args at the command line, it should report an error of something like --foo was not understood and exit with a (non-generic) error condition. If we want to model off of git itself, we should use error code 129.

This should have Aruba integration tests.

This should likely not be tackled until after/during #259, as the schematics for implementing it will change.