update gh-pages to 891c06cc

commit 891c06ccf9ee569bb196cecb8810e9fd89717e8c
Author: Richard Klancer <rpk@pobox.com>
Date:   Wed Apr 30 11:11:16 2014 -0400

    Land Mgmt: keep grass roots from prematurely dying
    
    [#70095564]
    
    Problem was that the formula that was intended to randomly vary the growth period lengths was generating NaNs abo

commit 40447bb7a9a7429c42446ba54d4eb0858be2edd6
Author: Richard Klancer <rpk@pobox.com>
Date:   Wed Apr 30 09:35:32 2014 -0400

    Land Mgmt: make both graphs use same color scheme
    
    [#70097942]