Remove/move around lots of settings/requirements.

We want to make this better match a microservice environment.

At first I thought it'd be OK to put the front-end app right inside of this one, but I'd actually find that harder to work with. I'm separating any front-end related material into a separate accounting-app repository which'll contain the actual Angular 2 front-end app.

The playbook to deploy the accounting system will take into account this separation.