Update TODO based on recent syntax changes.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@256 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Update demos to reflect newer syntax.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@257 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Rename MCMC related demos to be more consistent.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@258 edb9625f-4e0d-4859-8d74-9fd3b1da38cb