Merge pull request #3 from icaughley/master

Un GOing for Postgres
Ensure the LICENSE is included in the repository
Merge branch 'master' of github.com:realityforge/domgen
Make it exclude_unlisted_classes parameter in the persistence unit configurable
Add some thoughts/ a WIP for geometry into the core of domgen
Ensure that all service implementation methods are annotated with @Override
Rework the DAO layer so that there is a separation between implementation ad interface. Rename the classes to use Repository moniker to reflect the change