Stabilizing commit

* move request timeout settings to the configuration header
* initial support of requiredby dictionary
* add AWPatternFunctions namespace
* improve components communication
* update UI to recent abilities
* rewrite qCDebug messages and update CONTRIBUTING.md accordingly

sources/awesome-widget/plugin/awdataengineaggregator.h

@@ -38,6 +38,9 @@ public:
     // properties
     void setInterval(const int _interval);
 
+signals:
+    void deviceAdded(const QString &source);
+
 public slots:
     void dropSource(const QString source);
     void reconnectSources();