code: function save(firebaseRef) {
      return function(data, cb) {
          var firebase_update = {};
          firebase_update[data.id] = data;
          firebaseRef.update(firebase_update).then(cb);
      };
  }
docs: Given a firebase ref, will return a function that will save an object. The object must have an id property
  
  @param {Object} firebaseRef A reference to the firebase Object
  @returns {Function} The save function