chore(package.json): update to version 0.4.0-rc.2
docs(guide/getting started): add link to example project
docs(ROADMAP): fine tune the references to tags and branches
docs(README): fix formatting and show how to register a service
chore(package.json): update contributors list
chore(package.json): update to version 0.4.0!!!
docs(README_fr_FR): fix formatting and show how to register a service

Bonus : add link to dgeni-example