working on list management

src/main/java/de/srsoftware/widerhall/web/Rest.java

@@ -48,6 +48,7 @@ public class Rest extends HttpServlet {
             json.put(ERROR,"Not logged in!");
         }
         try {
+            resp.setContentType("application/json");
             resp.getWriter().println(json.toJSONString());
             return null;
         } catch (IOException e) {