2010-02 : Version 2.00
  This module replaces several previously existing language dependent modules adm/class/grades.xx
  of Gang Xiao. It has been constructed by localization of these modules, keeping a single 
  computation core and adding dictionaries.
  
Version 1.5:  

Version 1.1 : fix bugs (notes were not enregistred when they were modified in user page). 
BPR

