Update dopewars.c

dopewars.c:2616:84: error: macro "_" passed 3 arguments, but takes just 1
   -C, --convert=FILE      convert an \"old format\" score file to the new format\n"), DPSCOREDIR);
                                                                                    ^
dopewars.c:2588:12: error: ‘_’ undeclared (first use in this function)
            _("Usage: dopewars [OPTION]...\n\
            ^
dopewars.c:2588:12: note: each undeclared identifier is reported only once for each function it appears in
Removed _ and changed dopewars to Candy Wars in text.