Started working on the queryable side of interaction with Parse. This has seen the introduction of two new constructs to the system, and a repurposing of a third: Scopable provides the ability to define scopes in a model, and will also be the location of certain immediate type of queries like :find and :all; Criteria is an object which accumulates, via a small DSL, query constraints; finally, Queryable now is more for defining chainable methods which define constraints on a Criteria. Scopes may use anything which yields a Criteria, including the Queryable methods. Criteria will eventually be, themselves, Queryable, to provide the chaining mechanism.