first version of addSuper(T extends UpdatableService<T>) with 2 test
cases 
Rename SetValueTest into UpdatableServiceTest
Rename RemoveTest into RemovableServiceTest
Rename Restructor into UpdatableService
Merge branch 'master' of https://github.com/genericsystem/genericsystem2014.git
Merge branch 'master' of https://github.com/genericsystem/genericsystem2014.git
Refactoring : Manage setValue and addSuper with a FunctionalInterface