title: exception with method 'to_query' missing
body: <p>I'm trying to install Ruby Bossman, and the following exception happens:</p>
  
  <pre><code>/opt/local/lib/ruby/gems/1.8/gems/bossman-0.4.1/lib/bossman/boss.rb:10:in `initialize': undefined method `to_query' for #&lt;Hash:0x1010f0800&gt; (NoMethodError)
      from /opt/local/lib/ruby/gems/1.8/gems/bossman-0.4.1/lib/bossman/search.rb:12:in `new'
      from /opt/local/lib/ruby/gems/1.8/gems/bossman-0.4.1/lib/bossman/search.rb:12:in `method_missing'
      from es.rb:12
  </code></pre>
  
  <p>any idea? thanks</p>