Refactoring database persister

The goal is to compose the gathering of attributes and the method
that writes those attributes to disk
Merge branch 'refactoring-database-persister'

* refactoring-database-persister:
  Refactoring database persister
Adding dragonfly gem

> A Ruby gem for on-the-fly processing - suitable for image uploading
> in Rails, Sinatra and much more!

See https://github.com/markevans/dragonfly for more details
Adding ValuePresenter#label

Because I'm going to want to deal with this in a special way.
Adding ENV['DEBUG'] option for template rendering

Given the complexity of the view rendering, it is helpful to have a
view into the problems encountered.
Adding attachment rendering options for new/show

Working on handling file uploads via attachments.
Adding multipart encoding to forms.

I am uncertain why the forms don't default to `multipart: true`
Adding DateParser spec
Adding attachment parsers
Rearranging service methods

Removing custom builder functions for storage
Adding stubbed spec for persisting files