fix circular dep when instanciating em service from compiler pass
Merge pull request #151 from KnpLabs/feature/domain-event

[WIP] add a domain event implementation
add controller helpers
Merge pull request #152 from KnpLabs/fix/register-repositories-fail

fix circular dep when instanciating em service from compiler pass
Merge pull request #155 from KnpLabs/feature/controller-helper

[WIP] add controller helpers