title: Getting "uninitialized constant Zookeeper (NameError)" while trying to use zookeeper gem
body: <p>I'm trying to use <a href="http://github.com/wickman/zookeeper" rel="nofollow">zookeeper gem</a> and example code from README fails:</p>
  
  <pre><code>require 'rubygems'
  require 'zookeeper'
  z = Zookeeper.new("localhost:2181")
  z.get_children(:path =&gt; "/")
  </code></pre>
  
  <p>causes error:</p>
  
  <pre>
  ./zookeeper.rb:3: uninitialized constant Zookeeper (NameError)
   from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
   from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
   from zookeeper.rb:2
  </pre>
  
  <p>I'm googling and looking code and I really have no idea what to do...</p>