Implement initial UW mapping for QDC
user
```ruby
def uw_preview(identifier)
  id = identifier.rpartition(':').last.split('/')
  return nil if id.count != 2
  'http://cdm16786.contentdm.oclc.org/utils/getthumbnail/collection/' \
  "#{id[0]}/id/#{id[1]}"
end

Krikri::Mapper.define(:uw_qdc,
                      :parser => Krikri::QdcParser) do
  provider :class => DPLA::MAP::Agent do
    uri 'http://dp.la/api/contributor/washington'
    label 'University of Washington'
  end

  dataProvider :class => DPLA::MAP::Agent do
    providedLabel record.field('dc:source').first_value
  end

  isShownAt :class => DPLA::MAP::WebResource do
    uri record.field('dc:identifier').last_value
  end

  preview :class => DPLA::MAP::WebResource do
    uri header.field('xmlns:identifier').first_value
         .map { |i| uw_preview(i.value) }
  end

  originalRecord :class => DPLA::MAP::WebResource do
    uri record_uri
  end

  sourceResource :class => DPLA::MAP::SourceResource do
    collection :class => DPLA::MAP::Collection,
               :each => record.field('dcterms:isPartOf'),
               :as => :coll do
      title coll
    end

    creator :class => DPLA::MAP::Agent,
            :each => record.field('dc:creator'),
            :as => :creator do
      providedLabel creator
    end

    date :class => DPLA::MAP::TimeSpan,
         :each => record.field('dc:date').first_value,
         :as => :created do
      providedLabel created
    end

    description record.field('dc:description')

    dcformat record.field('dc:type')

    identifier record.field('dc:identifier')

    language :class => DPLA::MAP::Controlled::Language,
             :each => record.field('dc:language'),
             :as => :lang do
      prefLabel lang
    end

    spatial :class => DPLA::MAP::Place,
            :each => record.field('dc:coverage'),
            :as => :place do
      providedLabel place
    end

    rights record.field('dc:rights')

    subject :class => DPLA::MAP::Concept,
            :each => record.field('dc:subject'),
            :as => :subject do
      providedLabel subject
    end

    title record.field('dc:title')

    dctype record.field('dc:type')
  end
end
```
assistant