Added new ees functions to NAMESPACE; added documentation for the same

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@325 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed old documentation file of ees function

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@326 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed the example, added information on lmAMM arguments.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@327 edb9625f-4e0d-4859-8d74-9fd3b1da38cb