Adding Entity#initialize options

Also tweaking spec to remove usage of #tap
Adding first pass at EntityForm object
Adding a few property methods for convenience

As I'm working on the form object, I would like to treat the
form object as something that various form builders more regularly
interact with.

By exposing these questions as methods, I'm able to then compose the
EntityForm object a bit differently.
Pushing out EntityForm behavior

I want the EntityForm to conform to the expected behavior of an
ActiveRecord object. That is its methods are directly exposed.

This may be a bunny trail in that the views I've thusfar crafted don't
require this behavior.

But I want a Form object for applying validation.