setseed for method hregress fixed

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@818 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
further structure for chapter 2 added.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@819 edb9625f-4e0d-4859-8d74-9fd3b1da38cb