Added list of arguments accepted by the models.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@257 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed library calls from the code.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@258 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Small text change.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@259 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Rearranged text.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@260 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Shortened the title.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@261 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added lvalue to example result, removed extra brace.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@262 edb9625f-4e0d-4859-8d74-9fd3b1da38cb