title: Communication btw collectionViews in tableViewCells. This tableView is in another tableViewCell
body: <p>I have horizontal scrolling collectionViews.  They are nested inside a tableView bc I want independent horizontal scrolling.</p>
  
  <p>This is a card-game thing.  So there are 4 rows of 13 cards.</p>
  
  <p>The problem is, I need to control how many items the user can select across all four collection views.  </p>
  
  <p>I also need to get what items have been selected back to the main viewController.  I don't really know how to go about doing this.</p>
  
  <p>A custom tableViewCell is the datasource and delegate for the collectionView.</p>
  
  <p>I also need to know the value of the selected cells.  Thanks guys, this is a bit of a mess.  But I have the UI that I want.  Just have to make it work for the UX now.</p>