various changes to get proper building behavior with vignettes content


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/yags@64 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
deal with old multicore deps


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/yags@65 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
get rid of ff-related data that needs better design to be installable


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/yags@66 edb9625f-4e0d-4859-8d74-9fd3b1da38cb