Added property for query string parameters

Property qs for SignalR connection could be used to pass additional parameters to new SignalR persistent/hub connections. It is available since 1.0 and is present in 2.0 version of SignalR

signalr/signalr.d.ts

@@ -36,6 +36,7 @@ interface SignalR {
     logging: boolean;
     messageId: string;
     url: string;
+    qs: any;
 
     (url: string, queryString?: any, logging?: boolean): SignalR;
     hubConnection(url?: string): SignalR;