clamtest fixes: dimnames bug and solution for an extreme case.

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2369 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
stressplot.capscale also uses dist(u.eig %*% t(v)) instead of dist(u.eig)

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2370 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Merge branch 'r-forge-svn-local'