Moved some util3d methods to Transform.h, Graph.h and Compression.h

Added computePath() method implementating A star on graph
GUI: SetWindowModified() and user should explicitly save the GUI config to keep them
Calibration: added mirror checkbox, added device id argument

guilib/src/ExportDialog.h

@@ -50,6 +50,9 @@ public:
 	bool isDepth2dExported() const;
 	bool isOdomExported() const;
 
+signals:
+	void configChanged();
+
 private slots:
 	void getPath();