2 bugs fixed
2 bugs fixed

($_ eq "\n") or chomp;  ## it caused a bug like this: if you publish equiz, some answer it, then you delete it, the grade is not gone, when you republish it, one is stored as "equiz\n"(i still don't know how this happened), so you have two identical tasks in your tasklist. 
2nd bug at line 156: sometimes new score cannot cover an old score if it appeared before
iwelch/sylspace,iwelch/sylspace,iwelch/sylspace,iwelch/sylspace