janitorial after release of vegan 2.0-9

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2623 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
order references

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2624 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
warn if oecosimu transforms quantitative to binary data

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2625 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
nestednodf(..., weighted=TRUE) gave wrong fill and was inconsistent if data were binary

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2626 edb9625f-4e0d-4859-8d74-9fd3b1da38cb