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
adapt rakefile to use yast rake config
do not generate documentation with obsolete tools

Documentation was no longer generated for three years and plan is to
repalce it with something easier to maintain that we can generate
automatic.
changes
Merge pull request #58 from yast/no_builtin_doc

do not generate documentation with obsolete tools
add license text
generateYCPWrappers: check also for YCPNull to avoid segfault

when a parameter is missing (bnc#846467)

Conflicts:
	VERSION
	package/yast2-core.changes
Merge remote-tracking branch 'origin/master' into new_installer_to_master

Conflicts:
	package/yast2-core.changes