Persona integration, create draft from template

This adds:

- Persona integration (which serves no purpose but to allow you to login and logout at the moment).  Issue #56
- The ability to 'use' a badge template (creates a draft based on the template selected).  Issue #72

Note that this is broken right now, but I have PRs in at https://github.com/stenington/express-persona-observer/pull/5 and https://github.com/andrewhayward/express-monkey-patch/pull/1 that fix the problems.  This should not be merged until these two PRs, or equivalents, are merged first and the dependencies in this PR possibly updated as well.