More documentation and slight cosmetic code changes. 

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/aqr@47 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
fixing FALSE

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/aqr@48 edb9625f-4e0d-4859-8d74-9fd3b1da38cb