additional comments from Stefano, small fixes, fixed reference to QCDNUM as asked by Michiel

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1646 b2a8d302-ca0a-427a-b7b9-081adbce06bc
additional comments from Stefano, small fixes, fixed reference to QCDNUM as asked by Michiel

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1647 b2a8d302-ca0a-427a-b7b9-081adbce06bc