Documentation fix. 

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/tab@15 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed intercept issue with tabglm. 

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/tab@16 edb9625f-4e0d-4859-8d74-9fd3b1da38cb