v0.8.0: Auditing and user admin UI

This release adds auditing to user actions (login/logout, add and delete
users) as well as finally adding a UI at /admin (not linked) for
managing users.

The static files and views are now also embedded into the resulting
binary making deploys easier - just copy the binary and run!

* Add a script for creating new migrates
* Implement auditing
* Implement admin UI
* Use go-bindata to embed views and static data
* Tests: Move auth and template setup to init()
* Split job and job test code out