allow default 'adapt' to be specified via 'F.adaptive' in siaf.gaussian()

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/surveillance@771 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
checksiaf() modifications:
+ ...-arguments for polyCub
+ graphical check of distance distribution of simulated points


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/surveillance@772 edb9625f-4e0d-4859-8d74-9fd3b1da38cb