...RobExtremes: now the sigma search range could include negative values -> fixed

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@739 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
RobExtremes: now only let pass admissible starting estimators

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@740 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
argh: RobExtremes --- stills throws errors ... hopefully this is it

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@741 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
RobExtremes: committed script to check GEV ... 

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@742 edb9625f-4e0d-4859-8d74-9fd3b1da38cb