Created AnnotationKeyMatcher class.
Created AnnotationPairMatcher class.
Created AnnotationHashMatcher class.
Created AnnotationMorePairsMatcher class.
Created AnnotationArrayMatcher class.
Created AnnotationArrayValuesMatcher class.
Created AnnotationMoreValuesMatcher class.
Created AnnotationArrayValueMatcher class.
Created AnnotationValueInArrayMatcher class.
Created NestedAnnotationMatcher class and some indentation refactoring.