Updating presentation

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3377 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Minor fix to charting functions Add index entry to vignette

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3378 edb9625f-4e0d-4859-8d74-9fd3b1da38cb