Implemented p>n and faster piMOM Laplace approx

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mombf@201 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed bug

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mombf@202 edb9625f-4e0d-4859-8d74-9fd3b1da38cb