code: function shallowMerge(o1, o2) {
      var o = {},
          k;
  
      for (k in o1) o[k] = o1[k];
      for (k in o2) o[k] = o2[k];
  
      return o;
    }
docs: A simple helper to shallowly merge two objects. The second one will "win"
  over the first one.
  
  @param  {object}  o1 First target object.
  @param  {object}  o2 Second target object.
  @return {object}     Returns the merged object.