CAPM complete with CAPM plots and SML charts

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@53 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
quick CAPM demo draft

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@54 edb9625f-4e0d-4859-8d74-9fd3b1da38cb