[NEW] PCH file added as was missing, basic NSOperationQueue loading full size images and resizing them on the fly.
[NEW] Resized images are cached and returned via the NSOperation when available.
[NEW] Amended deployment target iOS to 7.0 as per spec.
[FIXED] Image resize now take screen scale into account
[FIXED] FeedTableViewCell photoImageView now adjusts it's width to accommodate the various device screen widths.