sendMessage via signal plot from file to window,

add severity to messages (black, yellow, red),
add about text,
removed unused texture from resource

QtMeshViewer/Header/OglViewerWidget.h

@@ -53,6 +53,7 @@ protected:
 
 private:
 	void initShaders();
+	void setConnections();
 
 private slots:
 	void resetView();