Blueprints for Transforms/Dictionaries

New blueprints are to support custom types or value formatting via methods (de)serialize. E.g to support an enum field in your database.

• Add blueprint for dictionary utility to use with transform objects
• Add value transform blueprint which uses util/dictionaries objects

See:

• https://github.com/pixelhandler/ember-jsonapi-resources/wiki/Enum-Attributes
• https://github.com/pixelhandler/ember-jsonapi-resources/wiki/Transforms