LRDOCS-768 Added note that Web Content structures and templates don't support file locking while Documents and Media does. Added workaround for operating systems that require WebDAV file-locking: use a third-party WebDAV like Cyberduck to avoid the requirement.
Merge pull request #678 from jrao/LRDOCS-768

https://issues.liferay.com/browse/LRDOCS-768