Add/Improve Javadoc for annotatedWith

[rweisleder]

This commit also incorporates the changes from #540, that meta-annotated-with predicates and conditions also consider direct annotations.

[codecholeric]

Thanks a lot for the improvement 😄 I changed two little things:

1. add a @param annotationTypeName description additionally to @see methodWithClass(Class) that explains that this is the fully qualified class name (because I have seen users struggle with this and using the simple class name)
2. for the negated explanation for meta-annotated-with I inverted the part in <p>, because I thought it might be misunderstood. E.g.
   The assertion is also successful if members are not directly annotated with the supplied annotation type. -> The assertion also fails if members are directly annotated with the supplied annotation type. Because the former sounds like it might already be a sufficient condition to be not directly annotated with the annotation type, while in fact it has to be neither annotated directly nor meta-annotated.

Anyway, I hope that this additional documentation will help users, in particular with the not obvious part about meta-annotated also matching direct annotations 👍

[rweisleder]

LGTM, thanks!