Needs "Schemaless" Entity support

[davidhstocker]

Right now, Graphyne is incapable of creating entities that are not already defined by a Memetic Meme. Memetic is awesome and all, but devs should be able to create a hello world graph without first writing XML, and presumably, they could get away with never, ever defining any schemas. We need to be able to define schemaless, generic entities at runtime, without a Memetic definition.