some minor updates and correction for version 1.0.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@727 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
some minor corrections (labels did not work correctly, warnings due to calling plot with "withMaxRisk") and updates.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@728 edb9625f-4e0d-4859-8d74-9fd3b1da38cb