Decided to fix the Arity problem later once more thorough testings of
Environment, PredicateReader, and Test are in place. I will accept
this... for now.
Added a tester to make sure that '-number' doesn't actually get
interpreted as a long.
Made sure that we could successfully get predicate paramtypes for a
given argument.
Update to the Predicate Test class
tested each 'predicate explore' getters