inherited class behavior

[narirou]

Hi.

When this plugin registered inherited cell, it does dequeueReusableCell as its supperclass.
In this case, it will occur crash because registered class and dequeued class is different.

class BaseCell: UICollectionViewCell, Reusable {}
class MyCell: BaseCell {}

let cellType: BaseCell.Type = MyCell.self

class CollectionViewController: UICollectionViewController {
  override func viewDidLoad() {

    // it is registered as "BaseCell". But I think this cell should be registered as "MyCell".
    collectionView.registerReusableCell(cellType)
  }

  override func collectionView(collectionView: UICollectionView,
    cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    // in this statement, the cell is "MyCell". (will be crashed)
    let cell = collectionView.dequeueReusableCell(indexPath: indexPath, cellType: cellType)

    return cell
  }

  // ...
}

If possible, I will send a pull-request. :)
Thanks.