Update to 0.15.0

git-svn-id: https://plugins.svn.wordpress.org/timber-library/trunk@792556 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update to 0.15.0

git-svn-id: https://plugins.svn.wordpress.org/timber-library/trunk@792563 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update to 0.15.0

git-svn-id: https://plugins.svn.wordpress.org/timber-library/trunk@792564 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update to 15.1

git-svn-id: https://plugins.svn.wordpress.org/timber-library/trunk@793635 b8457f37-d9ea-0310-8a92-e5e31aec5664