title: undefined method 'configure' inside the initializer? added a new ruby gem
body: <p>I installed the gem Bitly into my rails app</p>
  
  <p>I did it by running <code>gem install bitly</code></p>
  
  <p>then I manually added <code>gem 'bitly'</code> into my gemfile</p>
  
  <p>I created this inside `config\initializers\bitly.rb</p>
  
  <pre><code>Bitly.configure do |config|
    config.api_version = 3
    config.login = "myusername"
    config.api_key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  end
  </code></pre>
  
  <p>I'm trying to get my rails server running but I get this error I've never seen before</p>
  
  <pre><code>Exiting
  C:/app/config/initializers/bitly.rb:1:in `&lt;top (
  required)&gt;': undefined method `configure' for Bitly:Module (NoMethodError)
  </code></pre>
  
  <p>How can I resolve this issue and make this gem work?</p>
  
  <p>I am trying to use the gem inside one of my models</p>
  
  <pre><code>bitly.shorten("http://mydomain.com/article/#{id}")
  </code></pre>