Inform people that they can use the 15 if they want.

People are wondering about this. We don't have to support it permanently but we should tell people what the deal is.

In https://gitlab.slack.com/archives/development/p1447231735000006 @marin mentions "The package for 14.04 is working for 15.04 if you install it manually"

Should I change the text to reflect that @marin ?