Added new lmAMM function; fixing the AMM function then moving on to event studies; Work in progress

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@162 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removing old AMM wrapper function

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@163 edb9625f-4e0d-4859-8d74-9fd3b1da38cb