update plugin to latest bootstrap

git-svn-id: https://plugins.svn.wordpress.org/wordpress-bootstrap-css/trunk@876566 b8457f37-d9ea-0310-8a92-e5e31aec5664
version bump

git-svn-id: https://plugins.svn.wordpress.org/wordpress-bootstrap-css/trunk@876567 b8457f37-d9ea-0310-8a92-e5e31aec5664