revisions to EWMA and print method

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@102 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updating docs and adding demo for EWMA

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@103 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updating docs and adding demo for Monte Carlo. Updating docs for EWMA

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/uwgarp@104 edb9625f-4e0d-4859-8d74-9fd3b1da38cb