Make it possible to skip classes in the inheritance tree

[erikhofer]

Example:

@GenerateInterface class A {}
class B extends A {}
class C extends B {}

@GenerateInterface is inherited. This will result in:

interface IA {}
interface IB extends IA {}
interface IC extends IB {}

It should be able to skip B so that no interface is created for B:

interface IA {}
interface IC extends IA {}