Updating to 0.12.0

git-svn-id: https://plugins.svn.wordpress.org/timber-library/trunk@766400 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating to 0.12.0

git-svn-id: https://plugins.svn.wordpress.org/timber-library/trunk@766401 b8457f37-d9ea-0310-8a92-e5e31aec5664