Squashed commit of the following:

commit 9dfb167c47599a319b49e81056655bbb1206f825
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Nov 18 09:33:42 2014 +0200

    Do not put github README.md to the R package

    (cherry picked from commit 06f649426a44e065c5e435bbdfaf4d113ece9a22)

commit 546eeac33cc904b0d0e2def40a68c80fcf7f4053
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Nov 18 09:35:36 2014 +0200

    vegan 2.2-0 was released: everything goes to 2.2-1 from now on

commit 454a6247af58ba9f6b92a85485687681c00effbd
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Mon Nov 17 11:07:46 2014 +0200

    Update DATE for the last change in the released version

commit c0b78834b076f194556401702c78a36a870d3ddb
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Wed Nov 12 12:42:33 2014 +0200

    Better fix than 83d3bf1 and cca3f27 for resetting labels in envfit

    Previous fix only looked at the null of internal labels, but these
    can be null because the item (vectors or factors) was missing, or
    the item was there but names were missing. Fix cca3f27 failed
    in the first case and 83d3bf1 in latter case. Now we check for
    the existence of factors/vectors, and if only one them is present,
    we reset it labels whether they existed or were null.

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).

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vegan@2912 edb9625f-4e0d-4859-8d74-9fd3b1da38cb