Merge pull request #734 from soundcloud/master

add a suspension method to image downloaders

@@ -148,4 +148,9 @@ typedef void(^SDWebImageDownloaderCompletedBlock)(UIImage *image, NSData *data,
                                         progress:(SDWebImageDownloaderProgressBlock)progressBlock
                                         progress:(SDWebImageDownloaderProgressBlock)progressBlock
                                        completed:(SDWebImageDownloaderCompletedBlock)completedBlock;
                                        completed:(SDWebImageDownloaderCompletedBlock)completedBlock;
 
 
+/**
+ * Sets the download queue suspension state
+ */
+- (void)setSuspended:(BOOL)suspended;
+
 @end
 @end

@@ -212,4 +212,8 @@ static NSString *const kCompletedCallbackKey = @"completed";
     });
     });
 }
 }
 
 
+- (void)setSuspended:(BOOL)suspended {
+    [self.downloadQueue setSuspended:suspended];
+}
+
 @end
 @end