Improve ncd status logging

Fixes #12.

In addition, restore the original formatting of ncd status line in `/var/log/ncm-cdispd` to avoid breaking existing parser for this file (I know that line is parsed to raise attention when a component failed).

Still work in progress, would like to add the list of failed components as described in #12.
I confirm that `ncm-ncd` is removing state files only for components it ran successfully. If there is a file created in the state directory or a state file left from a component no longer part of the configuration, the file will never be removed by `ncm-ncd`. It has to be cleaned up manually.