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

<?php
namespace CorpusParole\Libraries\Mergers;

class JsonDocumentMerger {

    public function mergeJSON($doc, $jsonDoc) {

        return $doc;
    }
}