0.11.0 - API Simplifications

[0.11.0] - 2016.08.29 - API Simplifications

• 2016.08.29 - Add factory methods for EType and all its
  descendents. The older pattern of making embeddable companion
  objects into ETypes (e.g., case class Email extends EType[Email]) still works, but now you can just mention the EType
  directly, when building your subdomain. (E.g., Subdomain(???, ???, ETypePool(EType[Email]))).
• 2016.08.28 - Get rid of DerivedType.polyType and
  DerivedPType.polyPType. DerivedType and DerivedPType are now
  abstract classes instead of traits, so users may need to reorder
  their inheritance with clauses. (It's highly unlikely a user would
  have been be using these traits to extend a class.)