Business Domain class generator combinators

[Richard Warburton]

The goal for this issue is to make it easier for people to produce generators for classes in their domain model.

Eg: have a way of producing a constructor for a business domain object such as:

new BDO(someInt, someLong);

With an easy combinator, something like:

constructing(BDO::new).with(integersUpTo(10), longs());