Update Java package name

[paulhoadley]

Was ng just a placeholder package name? Should we update this to, say, is.rebbi.vermilingua now you've settled on a groupId? To some extent this is just aesthetic, and I don't want to create busy-work, but would just take a minute in Eclipse.

[hugithordarson]

I'm still not totally sure if I like the groupId, it was kind of picked in a hurry since the artifacts had to be published fast. Any thoughts?

[paulhoadley]

I think it does the job! Presumably it's a domain name you own. What's it for? (I see that https://rebbi.is/ does re-direct somewhere else, and I don't know what it says!)

[hugithordarson]

Yup, my domain, randomly picked as groupId. I'd like to mull it over a little. Picking names is hard...