[Reviewer: Matt] Homestead as HSS development

Fixes issues: metaswitch/crest#164, metaswitch/crest#162, metaswitch/crest#47. In conjunction with Phil's change of moving monit to upstart metaswitch/crest#148 should also be fixed. Also, included are ENTs for improved craft/syslog logs. Plus, command line tools for provisioning subscribers in the absence of Ellis.
I needed a hook to be able to properly stop statistic's ZMQ interface on exit. The ZMQ interface was not stopping on a SIGTERM without my other changes which resulted in a timeout and a SIGKILL when stopping homestead-prov.