Make 'Offline CLI' docs easier to find

I was trying to find docs related the 'Offline CLI' feature, but despite searching our docs for the word 'offline', nothing turned up.

I didn't know that the feature was called an 'embedded server' until I googled 'offline cli' and found this article: https://developer.jboss.org/wiki/OfflineCLIWork

I was thinking that customers might be doing the same thing in trying to find this feature.

We could make this content easier to find if customers are using the term offline to try and find it.

In a late night IRC chat, rhn-support-ahoffer suggested renaming the chapter to something like 'Embed a Server for Offline Configuration', which i think is a great idea.