ASINetwork queues now show the network progress indicator while network operations are in progress

(Based on Ken Collins' stuff here: http://pastie.org/550508)
Clean up ASINetworkQueue to use accessors everywhere to make subclassing easier

@@ -87,6 +87,13 @@
 // This method will start the queue
 - (void)go;
 
+// Used on iPhone platform to show / hide the network activity indicator (in the status bar)
+// On mac, you could subclass to do something else
+- (void)updateNetworkActivityIndicator;
+
+// Returns YES if the queue is in progress
+- (BOOL)isNetworkActive;
+
 
 @property (assign,setter=setUploadProgressDelegate:) id uploadProgressDelegate;
 @property (assign,setter=setDownloadProgressDelegate:) id downloadProgressDelegate;