Disable duplicate disk cache prevention with SDWebImageRefreshCached to handle 302 caching correctly

See https://github.com/rs/SDWebImage/pull/326#issuecomment-14791505 for more info

@@ -30,7 +30,7 @@
                                                                                target:self
                                                                                target:self
                                                                                action:@selector(flushCache)];
                                                                                action:@selector(flushCache)];
         _objects = [NSArray arrayWithObjects:
         _objects = [NSArray arrayWithObjects:
-                    @"http://static2.dmcdn.net/static/video/451/838/44838154:jpeg_preview_small.jpg?20120509163826",
+                    @"https://graph.facebook.com/olivier.poitrey/picture?height=200&width=200",
                     @"http://static2.dmcdn.net/static/video/656/177/44771656:jpeg_preview_small.jpg?20120509154705",
                     @"http://static2.dmcdn.net/static/video/656/177/44771656:jpeg_preview_small.jpg?20120509154705",
                     @"http://static2.dmcdn.net/static/video/629/228/44822926:jpeg_preview_small.jpg?20120509181018",
                     @"http://static2.dmcdn.net/static/video/629/228/44822926:jpeg_preview_small.jpg?20120509181018",
                     @"http://static2.dmcdn.net/static/video/116/367/44763611:jpeg_preview_small.jpg?20120509101749",
                     @"http://static2.dmcdn.net/static/video/116/367/44763611:jpeg_preview_small.jpg?20120509101749",
@@ -371,8 +371,9 @@
     }
     }
 
 
     cell.textLabel.text = [NSString stringWithFormat:@"Image #%d", indexPath.row];
     cell.textLabel.text = [NSString stringWithFormat:@"Image #%d", indexPath.row];
+    cell.imageView.contentMode = UIViewContentModeScaleAspectFill;
     [cell.imageView setImageWithURL:[NSURL URLWithString:[_objects objectAtIndex:indexPath.row]]
     [cell.imageView setImageWithURL:[NSURL URLWithString:[_objects objectAtIndex:indexPath.row]]
-                   placeholderImage:[UIImage imageNamed:@"placeholder"]];
+                   placeholderImage:[UIImage imageNamed:@"placeholder"] options:indexPath.row == 0 ? SDWebImageRefreshCached : 0];
     return cell;
     return cell;
 }
 }
 
 

@@ -137,13 +137,6 @@
                 {
                 {
                     BOOL cacheOnDisk = !(options & SDWebImageCacheMemoryOnly);
                     BOOL cacheOnDisk = !(options & SDWebImageCacheMemoryOnly);
 
 
-                    if (options & SDWebImageRefreshCached)
-                    {
-                        // When SDWebImageRefreshCached option is enabled, the disk caching relies on NSURLCache one.
-                        // We thus fork SDWebImage cache to be disabled so we don't duplicate the required storage space for nothing.
-                        cacheOnDisk = NO;
-                    }
-
                     if (options & SDWebImageRefreshCached && image && !downloadedImage)
                     if (options & SDWebImageRefreshCached && image && !downloadedImage)
                     {
                     {
                         // Image refresh hit the NSURLCache cache, do not call the completion block
                         // Image refresh hit the NSURLCache cache, do not call the completion block