Add developer database locally

1. Get the ais-developer-database.sql-file from Head of Internal Systems.
2. Move ais-developer-database.sql to the AIS repo and enter its directory.
3. vagrant up
4. vagrant ssh
5. Log into psql as postgres user: psql -U postgres
6. Drop database: drop database ais_dev;
7. Quit psql: \q
8. Create database as user postgres: psql -U postgres < ais-developer-database.sql