title: UICollectionViewFlowLayout doesn't use integral frames
body: <p>I have recently started using UICollectionView, and am a bit confused about the UICollectionViewFlowLayout. It would seem that the frames for each cell in the collection view are calculated with equal space between each item. This causes the frames of some of the cells to have fractional positions, which will cause blurry labels and misaligned image pixels and so on. </p>
  
  <p>I am surprised to find that there are no questions about this on stack overflow though, which makes me think I am doing something wrong. I have created a test project that demonstrates the problem quite simply:</p>
  
  <p><a href="https://github.com/rmaz/BlurryCollectionView" rel="nofollow">https://github.com/rmaz/BlurryCollectionView</a></p>
  
  <p>Is this really the standard behaviour? It seems to me that this makes the flow layout basically unusable without subclassing. Or am I missing something?</p>