Fixed creating of arguments to lmAMM, fixed handling of NULLs in model outputs, changed model examples to use the same data, throw a warning for less than 30 observations. Remove merge from marketModel.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@392 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed last row to make it similar to firm returns data.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@393 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed artificial event dates from lmAMM example.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@394 edb9625f-4e0d-4859-8d74-9fd3b1da38cb