title: Rails SSL::SSLError when trying to submit email to Mailchimp via Gibbon
body: <p>Controller:</p>
  
  <pre><code>def subscribe
  @list_id = "01d4743206"
  @gb = Gibbon::API.new
  @gb.lists.subscribe({:id =&gt; @list_id, :email =&gt; {:email =&gt; 'callumshorty@hotmail.com'}, :merge_vars =&gt; {:FNAME =&gt; 'First Name', :LNAME =&gt; 'Last Name'}, :double_optin =&gt; false})
  end
  </code></pre>
  
  <p>Gibbon.rb initializer:</p>
  
  <pre><code>Gibbon::API.api_key = "5dbfa9b02dd8a28aa43937d19855da6e-us9"
  Gibbon::API.timeout = 15
  Gibbon::API.throws_exceptions = false
  </code></pre>
  
  <p>View:</p>
  
  <pre><code>&lt;%= form_tag('/posts/subscribe', method: "post", id: "subscribe", remote: "true") do %&gt;
  
  &lt;%= email_field(:email, :address, {id: "mailersub", placeholder: "Enter your email"}) %&gt;
  
  
  &lt;%= submit_tag("Submit", id: "mailersubmit") %&gt;
  
  &lt;% end %&gt;
  </code></pre>
  
  <p>Routes:</p>
  
  <pre><code>post 'posts/subscribe' =&gt; 'posts#subscribe'
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Started POST "/posts/subscribe" for 127.0.0.1 at 2014-11-25 10:26:23 +0000
  Processing by PostsController#subscribe as JS
  Parameters: {"utf8"=&gt;"✓", "email"=&gt;{"address"=&gt;"callumshorty@hotmail.com"}, "commit"=&gt;"Submit"}
  Completed 500 Internal Server Error in 92ms
  
  OpenSSL::SSL::SSLError (SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed):
  app/controllers/posts_controller.rb:11:in `subscribe'
  </code></pre>
  
  <p>Any advice as to how I would go about fixing this would be greatly appreciated, not sure why this issue is arising as I seem to be using Gibbon the same way a lot of others do.</p>
  
  <p>Thanks.</p>