added tuning.method=c('sure','gcv') to lassot.fit

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pi0@328 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
correct minor typo in lassot.fit

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/pi0@329 edb9625f-4e0d-4859-8d74-9fd3b1da38cb