Adding PCB_GROUP to python interface

pcbnew/python/swig/board.i

@@ -62,6 +62,7 @@ HANDLE_EXCEPTIONS(BOARD::TracksInNetBetweenPoints)
 %include netinfo.i
 %include netclass.i
 %include pcb_plot_params.i
+%include pcb_group.i
 
 // std::vector templates
 %template(VIA_DIMENSION_Vector) std::vector<VIA_DIMENSION>;

pcbnew/swig/pcb_group.i

@@ -0,0 +1,6 @@
+
+
+%include pcb_group.h
+%{
+#include <pcb_group.h>
+%}