added debug prints in proj.y
removed Debug option
added a print after yyparse, and (commented) the call to the display function
changed the file gestion. now : allocation of a new class in the new rule ClassAlloc, link to the last allocated class in current (no more link to classList needed). Then, this link is given to each function that works on a class. At the end of the Class rule, the name is set and the class is added to the list.