ENH: Added some events for Selection.

Common/vtkCommand.cxx

@@ -95,6 +95,7 @@ static const char *vtkCommandEventStrings[] = {
   "UpdatePropertyEvent",
   "ViewProgressEvent",
   "UpdateDataEvent",
+  "CurrentChangedEvent",
   NULL
 };
 

Common/vtkCommand.h

@@ -335,6 +335,7 @@ public:
     UpdatePropertyEvent,
     ViewProgressEvent,
     UpdateDataEvent,
+    CurrentChangedEvent,
     UserEvent = 1000
   };
 //ETX