Looking at the old code again, adding of the class was done in a `setTimeout` so any initial styles could be applied before the class styles took effect. Might as well do the same here.

Also, I think it makes sense to add the class after `__create.apply`. So it would all look like

``` js
Masonry.prototype._create = function() {
  this._remapV2Options();
  __create.apply( this, arguments );
  setTimeout( function() {
    jQuery( this.element ).addClass( 'masonry' );
  });
};
```