removed R2BayesX dependency, started adding vis functions, no checking yet

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@808 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
working on vis.R

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@809 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
further families implemented

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@810 edb9625f-4e0d-4859-8d74-9fd3b1da38cb