Tons of language updates, a couple of minor bug fixes.

git-svn-id: https://plugins.svn.wordpress.org/wp-accessibility/trunk@1000766 b8457f37-d9ea-0310-8a92-e5e31aec5664
Switch to 1.3.9; lots of language updates.

git-svn-id: https://plugins.svn.wordpress.org/wp-accessibility/trunk@1000769 b8457f37-d9ea-0310-8a92-e5e31aec5664