Fixed calling of makeX from eventstudy function, fixed default print method.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@298 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Use the default args in lmAMM example.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@299 edb9625f-4e0d-4859-8d74-9fd3b1da38cb