Update server code integration for QtWebApp 1.7.11

- Adapt server code for QtWebapp namespace 'stefanfrings'
- Implement custom modifications needed by v1 controller
  via template engine
- Unify iphone and ipad templates

YACReaderLibrary/server/controllers/v1/pagecontroller.cpp

@@ -13,6 +13,10 @@
 
 #include "db_helper.h"
 
+using stefanfrings::HttpRequest;
+using stefanfrings::HttpResponse;
+using stefanfrings::HttpSession;
+
 PageController::PageController() { }
 
 void PageController::service(HttpRequest &request, HttpResponse &response)