Make it easier to use the DSL with Facts of different types in a RuleBook

[Clayton7510]

If you are using POJO Rules, this is a non-issue. But if you are using the Java DSL, then mixing types of Facts is cumbersome since generics suppose all Facts are of the same type.

This should be an easier thing to do. I'm thinking that a RuleBook can be of an unspecified type and then Rules of any type can be added. Facts of all types would be chained across Rules. But only Facts of the type of the Rule would be available in the When and Predicate, still keeping the lambda syntax pretty streamlined.

[Clayton7510]

I think this is going in with v0.4 as part of the DSL updates. This is really done except for some needed refactoring
In terms of the refactoring, I am looking to converge the functionality between StandardDecision and StandardRule. I'm thinking StandardDecision will probably end up being a decorator for StandardRule.