New package for responses.
Move Responses in the proper package.
When 404, this response is The response.
Use the new package.
Use the new responses.
Refactor whitespaces.
Find by ID endpoint.
New conversion: from DataEntry to a new DBObject.

This allows to get the ID before/after the insert.
New target fixture.
Fix a counter.
Fix Array count in test GetAll.
Add a test to findById.