Use NagiosReporter for Nagios outputs.

Makes pnp4nagios happy.

This removes the ugly calculation of the QU and UU fields.
cleanup show_jobs, restore user details
use vsc.utils.nagios
use NagiosReported in show_stats
Merge pull request #1 from stdweird/nagiosreporter

Nagiosreporter
Merge pull request #3 from piojo/nagiosreporter

Use NagiosReporter for Nagios outputs.