project: least squares fitting of HIV model

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@44 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
additional least squares script

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/colgem@45 edb9625f-4e0d-4859-8d74-9fd3b1da38cb