bug (click a link and then go back and then click the link again, it may cause progress never complete ) #71
Description
"BOOL isNotRedirect = _currentURL && [_currentURL isEqual:webView.request.mainDocumentURL]" should be "BOOL isNotRedirect = _currentURL && [_currentURL isEqual:webView.request.URL];" in "- (void)webViewDidFinishLoad:(UIWebView *)webView" and "- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error".