updated software refs

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@1065 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
slightly changed R2BayesX.Rnw description on BayesXsrc package

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@1066 edb9625f-4e0d-4859-8d74-9fd3b1da38cb