Web Content Structure and Template Editor

The WC structure/template editors are now up to date with the current 6.2 M5 release. I also converted the sample Velocity code in the template example to FreeMarker. I was able to convert all instructions and explanations successfully based on the new editors.

https://issues.liferay.com/browse/LRDOCS-344
https://issues.liferay.com/browse/LRDOCS-498