Missing raise option in last release

Hi,
Today I updated to last release and discover that raise option (Feralchimp.raise = true) failed in my Sinatra app. I remove that declaration and everything was fine, I was already catching Feralchimp::MailchimpError, but I think, it was a good option.
So, my small changes. I keep existing behavior (the new one) with raise option to true.
Thanks for this simple, clean and great gem. Really nice design with use of metaprogramming!