ongoing redraft of vignette.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/tsdbi@533 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fixed DESCRIPTION titles to tile case.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/tsdbi@534 edb9625f-4e0d-4859-8d74-9fd3b1da38cb