code: function GFSupload(mongoinst, prefix) {
    this.mongo = mongoinst;
    this.db = this.mongo.db;
    this.Grid = this.mongo.Grid;
    this.GridStore = this.mongo.GridStore;
    this.ObjectID = this.mongo.ObjectID;
    this.prefix = prefix || this.GridStore.DEFAULT_ROOT_COLLECTION;
    return this;
  }
docs: This class enables gridfs uploads for all the mongoose users
  
  @constructor
  @param {Object} mongoose Mongoose Object from you application
  @param {String} prefix Prefix for the database like "imports"
  @author "Dominic Böttger" <Dominic.Boettger@inspirationlabs.com>
  
  @return {Object}