title: I can't install rails on OSX 10.7.5
body: <p>Whenever I run</p>
  
  <pre><code>    sudo gem install rails
  </code></pre>
  
  <p>I get the following output:</p>
  
  <pre><code>   ERROR:  Loading command: install (LoadError)
  cannot load such file -- openssl
  ERROR:  While executing gem ... (NoMethodError)
  undefined method `invoke_with_build_args' for nil:NilClass
  </code></pre>
  
  <p>RVM version: rvm 1.18.14
  and Ruby is 2.0.0p0</p>