Adding documentation for data sets

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@140 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
removing unused data files

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@141 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixing data alignment in CAPM vignette

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@142 edb9625f-4e0d-4859-8d74-9fd3b1da38cb