gh-pages: ignore bower assets
Update gh-pages to fe1b6000

Changes:

commit fe1b6000a9ea3e1025da6175012fd27f1d60bf72
Author: Richard Klancer <rpk@pobox.com>
Date:   Mon Apr 14 12:42:58 2014 -0400

    Land Mgmt: Plant growth should be exponential
    
    [#67110390]

commit d8aadc0b509534b36c9c3482f76056d7ae2d4de0
Author: Richard Klancer <rpk@pobox.com>
Date:   Mon Apr 14 12:50:35 2014 -0400

    Fix apparent assignment-vs-comparison bug

commit 994a189db215102223011177e908cd3b1d62175a
Author: Richard Klancer <rpk@pobox.com>
Date:   Fri Apr 11 14:39:14 2014 -0400

    Land Mgmt: don't regenerate topsoil
    
    [#67109678]
    [#67110390]
    
    Also makes subsoil slower to erode than topsoil

commit 79d89f9088825b9d61977834876192d05ec4ffa3
Author: Richard Klancer <rpk@pobox.com>
Date:   Fri Apr 11 12:04:08 2014 -0400

    Land Mgmt: Track topsoil status of eroded patch
    
    [#67109678]

commit 3cdf3e288650531957b553bb0c9f9131928112f1
Author: Richard Klancer <rpk@pobox.com>
Date:   Fri Apr 11 11:58:09 2014 -0400

    Land Mgmt: rm unused properties (sky|land)Patches
    
    Not only are they not used, but @skyPatches wasn't being updated when patches were changed to sky during erosion.

commit 02f60f40e08565e201e6590a54e8d75207edf75c
Author: Richard Klancer <rpk@pobox.com>
Date:   Wed Apr 9 15:45:03 2014 -0400

    Allow public/ to be a repo with gh-pages branch
    
    [#69018126]