code: function loadFile(file, db, callback) { 
      callback = callback || function() {};
      
      if (file.substr(0, 1) !== '/') {
          var parentPath = module.parent.filename.split('/');
          parentPath.pop();
          file = parentPath.join('/') + '/' + file;
      }
      
      load(require(file), db, callback);
  }
docs: Loads fixtures from one file
  
  TODO: Add callback option
  
  @param {String}      The full path to the file to load
  @param {Connection}  The mongoose connection to use
  @param {Function}    Callback