added new requestForBandwidthViewerForInterface function

WRTStatusClient.h

@@ -30,6 +30,7 @@
 - (id) initWithHostname:(NSString*)new_hostname port:(NSInteger*)new_port username:(NSString*)new_username password:(NSString*)new_password;
 
 - (NSMutableURLRequest*) buildRequest:(NSString*)uri;
+- (NSMutableURLRequest*) requestForBandwidthViewerForInterface:(NSString*)interface;
 - (void) getStatusUpdate:(NSString*)uri delegate:(id)delegate;
 
 - (NSString*) getHostname;

WRTStatusClient.m

@@ -43,6 +43,13 @@
   return [theRequest autorelease];
 }
 
+- (NSMutableURLRequest*) requestForBandwidthViewerForInterface:(NSString*)interface
+{
+  NSString *endpoint = [NSString stringWithFormat:@"graph_if.svg?%@", interface];
+  
+  return [self buildRequest:endpoint];
+}
+
 - (void) getStatusUpdate:(NSString*)uri delegate:(id)delegate
 {