carrierwaveuploader/carrierwave — pull request #1446 by nashby (2014-08-27 08:01:51+00:00)
Title: Change image extension when converting formats.

It's a new version of https://github.com/carrierwaveuploader/carrierwave/pull/404 but I think it should be default behaviour and we don't need that rename option. @bensie what do you think?