Tools for monitoring message bus

*PLEASE DO NOT COMMIT THIS TO MASTER*. The intent is to
separate code & config, but for purposes of this review I'm
including Red Hat-internal config in src/py/config.ini.sample

Also, it's incomplete. I haven't completed the specfile
changes nor even touched Makefile*.

Status as of 2014-09-30T14:30 EDT: build-monitor is running
under systemd on rcm-img06. So is the kinit refresher, on
a 2-hour systemd timer.

WORK REMAINING:
  * Deciding on a username/groupname for unprivileged running
  * Few hours of packaging work (less if done by someone
    familiar with the existing specfile & autoconf).
  * Review
  * Splitting out RH-internal config (config-ini.sample)
  * Coordination between monitor & treecompose scripts (socket)