Update to commit 4f72c10 from git@github.com:x-team/wp-widget-customizer.git

Includes the following commit(s):

commit 4f72c106068ed6f344f6c0c64ea6592eacacac8b
Author: Weston Ruter <weston@x-team.com>

    Bump date for 3.9 cycle

M	readme.md
M	readme.txt


git-svn-id: https://plugins.svn.wordpress.org/widget-customizer/trunk@836007 b8457f37-d9ea-0310-8a92-e5e31aec5664