Extension, pick up the Ti.Network.HTTPClient 401 response on async

TiNetworkHTTPClientProxy+Extend.m

// http://stackoverflow.com/questions/3912532/ios-how-can-i-receive-http-401-instead-of-1012-nsurlerrorusercancelledauthenti
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-protocol-method-implementation"
-(NSNumber*)status
{
    NSString *strError = [NSString stringWithFormat:@"%@", [[[self response] error] description]];
    if ([strError rangeOfString:@"Code=-1012"].location != NSNotFound)
    {
        return NUMINTEGER(401);
    }
    else
    {
        return NUMINTEGER([[self response] status]);
    }
}
#pragma clang diagnostic pop