Demonstrate the CQRS pattern using a REST resource

We should demonstrate the use of the CQRS pattern in the context of REST resources, in a quickstart. We should demonstrate :

• The use of a cache to avoid database hits when fetching resource representations (typically for all GETs, even with query parameters)
• The use of synchronizations to ensure that the cache is updated after the resource is mutated through some operation (typically for PUT/POST/DELETEs).