[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'm not sure I understand your comment but from reading the code in more detail, I think `TWISTED_ERROR` is a `PDLog` - is that right?  I think this ties into my previous comment that we should namespace our PDLog error messages - it's just not very obvious that this is an instance of PDLog.