Web Content Management chapter updates for 6.2

I'm going to leave LRDOCS-583 in progress because I still have a couple plugin related instructions to complete (Kaleo Workflow). I've had some issues deploying 6.2 plugins, but I'll try and get these issues resolved and have the plugin related sections done ASAP. Here are the related tickets:

http://issues.liferay.com/browse/LRDOCS-583 (keeping in progress, for now)
http://issues.liferay.com/browse/LRDOCS-484
http://issues.liferay.com/browse/LRDOCS-648
http://issues.liferay.com/browse/LRDOCS-678

Also, ongoing work for LRDOCS-560 (updating images) has been done through chapters 1-2 of User Guide.