Using @NSManaged for KVC to-many accessor methods

[Jean-Daniel]

Feature Request

Since Xcode 7.3, it is now possible to use @NSManaged with methods as well as properties.
So, instead of generating custom methods for KVC to-many accessors, it is now possible to let the compiler do the hard work:

@NSManaged var employees: NSSet

@NSManaged func addEmployeesObject(employee: Employee)
@NSManaged func removeEmployeesObject(employee: Employee)
@NSManaged func addEmployees(employees: NSSet)
@NSManaged func removeEmployees(employees: NSSet)

Using that new feature, it should be possible to simplify the swift2 generated code.