linked call of f to package::f

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/riskscore@89 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
replaced formula[2] stunt by new prodlim::EventHistory.frame

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/riskscore@90 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
changed ipcw.R where now the new EventHistory.frame function from prodlim is used to generate the temp data

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/riskscore@91 edb9625f-4e0d-4859-8d74-9fd3b1da38cb