started adding minijava grammer as methods with void for the moment
added all grammer with void types but EMPTY choice and nt_Exp not complete
seemingly fixed the EMPTY issue and nt_Exp issue as well, warnings are still there though
fixed choices for nt_Exp() I think, nt_VarDecl() still has a warning though
finished part a) of Cw2
a) part complete for CW2
changed to curly brackets for empty choice
PART a) done for CW2