** C++ skeletons improvements
+*** parser header (%defines) is no longer mandatory (lalr1.cc)
+
+ In which case, if needed, the support classes are defined in the generated
+ parser, instead of additional files such as position.hh and location.hh.
+
*** locations are no longer mandatory (lalr1.cc, glr.cc)
Both lalr1.cc and glr.cc no longer require %location.