+ add de page

* rewrite de configuration to use qsettings
- remove cppcheck
+ add notifyrc

sources/plasmoid-kf5/plasmoid/contents/config/config.qml

@@ -33,6 +33,12 @@ ConfigModel {
          source: "appearance.qml"
     }
 
+    ConfigCategory {
+         name: i18n("DataEngine")
+         icon: "/usr/share/pixmaps/netctl-gui-widget.png"
+         source: "dataengine.qml"
+    }
+
     ConfigCategory {
          name: i18n("About")
          icon: "help-about"