Add lookAt command to cupro commands grammar

psGrammar/demos/cupro/commands.jsgf

 #JSGF V1.0;
 grammar commands;
 
-public <command> = [<robot>] ( <followMe> | <stop> | <ordering> | <learn> | <rec> | <count> | <explain> | <listen> | <hand> | <see> | <save> | <who> | <gripper> | <demo> | <grasp> | <kitchenDrawer> | <cleanup> | <setTable> );
+public <command> = [<robot>] ( <followMe> | <stop> | <ordering> | <learn> | <rec> | <count> | <explain> | <listen> | <hand> | <see> | <save> | <who> | <gripper> | <demo> | <grasp> | <kitchenDrawer> | <cleanup> | <setTable> | <lookAt> );
 
 <robot> = (tiago | robot | tobi);
 
@@ -23,3 +23,4 @@ public <command> = [<robot>] ( <followMe> | <stop> | <ordering> | <learn> | <rec
 <kitchenDrawer> = (tell me about the kitchen);
 <cleanup> = (clean up the table);
 <setTable> = (set the table);
+<lookAt> = (look at camera one | look at the camera);