implemented comments from M. Botje

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1634 b2a8d302-ca0a-427a-b7b9-081adbce06bc
implemented Andreys comments

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1635 b2a8d302-ca0a-427a-b7b9-081adbce06bc
added comments from Joel

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1636 b2a8d302-ca0a-427a-b7b9-081adbce06bc