I have built a sub-theme for a customer back in April and at the time, the version 2.7 was the latest stable release and therefore the choice for the customer. I am still maintaining this theme and I have to bring other developers online to do the same thing. But I also start new projects and there I'd like to get started from version 3.
Therefore here a couple of questions:
How can I get the old and new version work side by side on the same maschine? I'm using Ubuntu as my operating system, just in case that makes any difference.
How can I get compass and compass-aurora installed with the older version for the Aurora 2.7 theme?
Hope there are solutions for that and thank you for your help.