changed maniGrammar

psGrammar/tasks/manipulation/manipulationTask.jsgf

 #JSGF V1.0;
 grammar manipulationTask;
 
-public <navigation> = tobi [please] (<cleanShelf> | <table>);
-<cleanShelf> = clean the shelf;
-<table> = clean the table;
+public <navigation> = (tobi | biron) [please] ( clean the <cleanShelf> | <table>);
+
+<cleanShelf> = (shelf);
+<table> = (table);