Modified the man pages

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@209 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed AMM vignette R code

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@210 edb9625f-4e0d-4859-8d74-9fd3b1da38cb