Adding crsp weekly returns data

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@112 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Minor revisions to GARCH code and docs

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@113 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Adding source code for efficient frontier section

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@114 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Adding Delineating Efficient Portfolios vignette

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@115 edb9625f-4e0d-4859-8d74-9fd3b1da38cb