enum Answers implements now Answer<Object>

The enum type Answers implements now the Answer interface. This allows us to use the enum values in Mockito.mock(Class,Answer). This is handy when you have to test legacy code with PowerMockito and want to use both @Mock and Mockito.mock(..).

@Mock(answers=RETURNS_DEEP_STUBS) 
ClassA a;
ClassB b;

public void setUp(){
  b= mock(ClassB,Mockito.RETURNS_DEEP_STUBS)   //<< static import is not possible here, but with this pull request we can use RETURNS_DEEP_STUBS we used in @Mock.
}
  
For backward compatibility I propose to keep the `get()` method and add the `@Deprecated` annotation, also adding a documentation explaining how this method can be replaced and that this method will be removed in a future version.