Removed unneeded data sets, clubbed all the other returns into one rda, added it's manual.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@319 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed extra text.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@320 edb9625f-4e0d-4859-8d74-9fd3b1da38cb