title: Capistrano is complaining
body: <p>Hi im trying to deploy a script, 
  after writting it </p>
  
  <p>I ran a <code>cap deploy:check</code></p>
  
  <p>I get this error </p>
  
  <pre><code>/var/lib/gems/1.8/gems/sshkit-1.3.0/lib/sshkit.rb:32: undefined method `require_relative' for main:Object (NoMethodError)
  from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
  from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
  from /var/lib/gems/1.8/gems/capistrano-3.1.0/lib/capistrano/all.rb:2
  from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
  from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
  from /var/lib/gems/1.8/gems/capistrano-3.1.0/bin/cap:2
  from /usr/local/bin/cap:19:in `load'
  from /usr/local/bin/cap:19
  </code></pre>
  
  <p>I understand that, sshkit is not installed and required in my deploy.rb
  Or is this a versioning problem?.
  Im running ubuntu.</p>