adapt to incompatible changes in bison 3.0

Announcement of bison 3.0 release and its incompatible changes:
http://lists.gnu.org/archive/html/info-gnu/2013-08/msg00000.html
adapt to type specified parameter also Parser itself
changes
Merge pull request #57 from mvidner/adapt_to_bison_3.0_rebase

adapt to incompatible changes in bison 3.0