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/static.cpp

@@ -9,6 +9,11 @@
 #include <QFile>
 #include <QString>
 
+using stefanfrings::HttpResponse;
+using stefanfrings::HttpSessionStore;
+using stefanfrings::StaticFileController;
+using stefanfrings::TemplateLoader;
+
 QString Static::configDir = nullptr;
 
 TemplateLoader *Static::templateLoader = nullptr;