Simplify FoalTS public interface.

[LoicPoullain]

Following debates with other people and deep thoughts on some use cases, v0.4 will have some breaking changes in its public interface. Note that v0.3 was a Proof of Concept, not a solution ready for prod.

• Rename update and patch to replace and modify.
• Controllers are not any more a sub-category of services.
• The controller binders become the controllers.
• RestController is replaced by PartialCRUDService, CRUDService, CreateService, ReadService, UpdateService, DeleteService.
• module.controllerBindings|imports become module.controllers|modules.
• Split @foal/core into @foal/core and @foal/common.
• Add more tests.