This extension is asked by the Italian Wikivoyage community, see bug 43980.
[ Taking this bug. ]
[ Adding tracking bug 31235. ]
First review: http://www.mediawiki.org/wiki/User:Dereckson/Reviews/Nimbus
I resolved the bug 43980 as WONTFIX per the review issues.
We currently deny this extension to be installed on our facility.
Please reopen a bug if the extension issues are fixed in the future.