Minor modifications

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lba@3 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Implemented the fixedSD option for scaling lba models

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