New book by John Nash

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ctv@1978 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added another book.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ctv@1979 edb9625f-4e0d-4859-8d74-9fd3b1da38cb