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/ExportCloudsDialog.h

@@ -76,6 +76,9 @@ public:
 	void setMeshNormalKSearch(int k);
 	void setMeshGp3Radius(double radius);
 
+signals:
+	void configChanged();
+
 public slots:
 	void restoreDefaults();