Work on test fixtures: - get rid both on bo and front of 2 fixtures files for documents - correct dl_fixtures to reflect this - upgrade mirage from 0.1.13 to 0.2.0 - download new version of documents fixtures including geo information

// mirage/serializers/blog-post.js
import BaseSerializer from './application';

export default BaseSerializer.extend({
    attrs: ['id', 'title', 'language', 'url', 'issued', 'modified']
});