#3 Predicate filters that return single entity instances

[Paul C Smith]

The PredicateFilter builder currently only generates FindAll methods, which return filtered Data-Access class instances (i.e. collections).

Predicates that return a single instance of the entity class would be really convenient. (Developers would need to code defensively and only use such filters when *positive* that the search won't return more than one record, or at least use a predictable method of choosing which item from the filtered resultset to return.)