changing from power to sse

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/power@11 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
changing folders power to sse

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/power@12 edb9625f-4e0d-4859-8d74-9fd3b1da38cb