Moved functions around.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@283 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Content and formatting improved.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@284 edb9625f-4e0d-4859-8d74-9fd3b1da38cb