Squashed commit of the following:

commit ad5f0dac7e52c2e0c85bd863dd8a47fd88f50975
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Nov 11 13:46:06 2014 +0200

    Fix labelling envfit plots with a vector of labels

    Fixes bug report #74 at github.com: it was documented that you
    do not need to use a list(vectors=, factors=) to relabel plotted
    items if there is only one type of items (vectors or factors).

commit a2f6b3b49ad94a14b6aa9319830133977a6e502f
Merge: 65e815f a6d876b
Author: Gavin Simpson <ucfagls@gmail.com>
Date:   Mon Nov 10 10:43:22 2014 -0600

    Merge branch 'typo-design-vignette' into cran-2.2

commit a6d876b70b2f91017e84793dea0e2a18560d0ad2
Author: Gavin Simpson <ucfagls@gmail.com>
Date:   Mon Nov 10 09:31:11 2014 -0600

    typo had symbolic forms for species and site scores swapped in table caption?

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vegan@2911 edb9625f-4e0d-4859-8d74-9fd3b1da38cb