project-conf - example IRIs that follow obo foundry purls, default namespace

[mjy]

Minor suggestions:

• when a user is familiar with how they expect OBO purl based IRIs to look, then it would be good to illustrate what the configuration file should look like such that the outcome is PURL style IRIs
• It would be wonderful if the curator could provide a default namespace ("HAO") in the project-conf that would be prefixed to ids and IRIs where appropriate