added continue to sfb

ps-grammar/sfb/review.jsgf

 #JSGF V1.0;
 grammar A4_inspection;
-public <review> = [tobi] [please] (<follow> | <observe> | <teach> | <locate> | <list> | <leave> | <stop> ) [please] [tobi];
+public <review> = [tobi] [please] (<follow> | <observe> | <teach> | <locate> | <list> | <leave> | <continue> | <stop> ) [please] [tobi];
 
 <follow> = ( follow me [into the elevator] ) | (observe) | (watch) ;
 <observe> = (start observing | ([take a] look [(at this | here)]));
 <leave> = leave;
+<continue> = continue;
 <stop> = (stop [observing | it]);
 <teach> = ( (this is [a | an | the] ) | ( these are [the] ) ) <object>;
 <locate> = ( ( where is [a | an | the] ) | ( where are [the] ) ) ( <object> | <furniture> );