title: Ruby ffi gem issue
body: <p>I installed <code>wpscan</code> - a Ruby programm for finding security issues on Wordpress sites. But when I tried to run it I got the following message:</p>
  
  <pre><code>[ERROR] dlopen(/Library/Ruby/Gems/2.0.0/gems/ffi-1.9.2/lib/ffi_c.bundle, 9): Library not loaded: /Users/headius/.rvm/rubies/ruby-head/lib/libruby.2.1.0.dylib
  Referenced from: /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.2/lib/ffi_c.bundle
  Reason: image not found - /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.2/lib/ffi_c.bundle
  </code></pre>
  
  <p>My operating system is OS X Mavericks, but I don't have user with name <code>headius</code> and folder <code>.rvm</code>. I tried to reinstall <code>ffi</code> gem several times but nothing changed. I know that something wrong with <code>ffi_c.bundle</code> but this is a binary file and I don't know how to fix the path to <code>libruby.2.1.0.dylib</code> in it.</p>
  
  <p>So, does anybody know how to fix this issue?</p>