Fixed the lmAMM residuals class, added residuals for excessReturn type.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@401 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed output model for type None, added residual series to this type.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@402 edb9625f-4e0d-4859-8d74-9fd3b1da38cb