import of CINT tag v5-16-13 from the CINT CVS.
For what else is new see http://root.cern.ch/root/Cint.phtml?relnote.

In particular extend the CINT api and remove reliance on MAKEINFO


git-svn-id: http://root.cern.ch/svn/root/trunk@15434 27541ba8-7e3a-0410-8455-c3a389f83636