Deploy common app tool / admin dashboard

[mblayman]

The tool for linking Common App school is complete. It's time to try it out on the production site.

• [x] Test things out on Vagrant
• [x] Deploy to production
• [x] Check out Rollbar
• [x] Start using tool to see how it works in practice
• [ ] Adjust to needs

[mblayman]

We'll "adjust to needs" in #368.