Better db-migrate:
  * bin/db-migrate understands the configuration conventions described in README.md
  * test/migration.test.js provides groundwork for migration tests
  * database.json removed
Make DATABASE_DRIVER required, must currently be mysql
Merge pull request #42 from stenington/atuls-db-migrate

Better db-migrate
Merge remote-tracking branch 'upstream/master' into openbadger-integration

Conflicts:
	README.md
	package.json