LinkBuilder and LinkBuilderFactory interface extracted from ControllerLinkBuilder for easier mocking and so that alternative implementations (such as for CXF) can be created.
Improve ResourceAssemblerSupport by introducing a dedicated method instead of an overload. Got rid of EntityId in the course. ControllerLinkBuilder now inspects type hierarchy for @RequestMapping annotations instead of the class only. Made links list in ResourceSupport final. Polished variable names and JavaDoc.
