Create pipeline, stage, implement validation and dispatch stage.
Add dummy command and command handler classes for proof of concept.
Create CommandHandlingBundle to integrate pipeline with Symfony2.
Integrate pipeline into CommandController.
Convert command validation exceptions into a JSON response.
Add IdentityId.
Create Identity aggregate root and creation command/event.
Rename services.yml to pipeline.yml.
Handle CreateIdentityCommand and store events in in-memory store.
Register event bus event listeners using tag.
Add missing license header.
Remove message from InvalidCommandException.
Move command handling into bundle. Move Pipeline et alii into own NS.
Id stores $value.
Enforce Identity::create() factory method.
Rename IdentityId to NameId.
Move Identity aggregate root to Surfnet\Stepup namespace.
Create pipeline ProcessingAbortedException with generic #getErrors().
Create handy InvalidArgumentException factory method.
Add service definition file dedicated to command handlers.