capscale prints the value of additive constant with 'add = TRUE'

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2357 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
add print, scores and plot methods for wcmdscale

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2358 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Merge branch 'r-forge-svn-local'