update docuemtnation link on upload_content.php

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@1031216 b8457f37-d9ea-0310-8a92-e5e31aec5664
finalize links on upload content page

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@1031217 b8457f37-d9ea-0310-8a92-e5e31aec5664