Add methods to ERXKey that simplify creation of ERXExistsQualifiers. e.g., aPerson.PETS.atLeastOneSatisfies(Pet.IS_DOG.isTrue()); and aPerson.PETS.anySatisfy(Pet.IS_DOG.isTrue());
Change qualifier method name to be more consistent with existing qualifier names, add isEmpty and isNotEmpty relationship qualifiers also.
Merge branch 'ERXKey_ExistsQualifierAddition' of https://github.com/nekesto/wonder