added follow me as confirm yes to follow me confirm grammar

ps-grammar/followMe/confirm.jsgf

 #JSGF V1.0;
 grammar ToBI_confirm;
 public <confirm> = [tobi] (<confirm_yes> | <confirm_no>) [tobi];
-<confirm_yes> =  [please] yes [please];
+<confirm_yes> =  [please] yes [please] | [tobi] folow me [please] | [tobi] [please] follow me;
 <confirm_no> = no [thanks];