Commit to dev; bug fixes, responsive video

git-svn-id: https://plugins.svn.wordpress.org/accessible-video-library/trunk@918209 b8457f37-d9ea-0310-8a92-e5e31aec5664
language directory

git-svn-id: https://plugins.svn.wordpress.org/accessible-video-library/trunk@918211 b8457f37-d9ea-0310-8a92-e5e31aec5664