First version of covariance -> nuisance representation conversion. At the moment works for syst. matrix only

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1523 b2a8d302-ca0a-427a-b7b9-081adbce06bc
Provide sample namelists for covariance to nuisance transform

git-svn-id: https://svnsrv.desy.de/basic/h1fitter/trunk@1524 b2a8d302-ca0a-427a-b7b9-081adbce06bc