This version has been yanked, and it is not available for download directly or for other gems that may have depended on it.
To use Memcached as caching back-end, install the 'dalli' gem.
To use multipart post, install the 'multipart-post' gem.
To use curl as the http engine, install the 'patron' gem. This feature is not available (and should be unneccessary) on jruby.
To use eventmachine as a parallel backend, install the 'eventmachine' gem.