title: Test Kitchen login command failing
body: <p>I'm following <a href="http://kitchen.ci/docs/getting-started" rel="nofollow">this</a> getting-started guide for test kitchen and made some initial good progress. However when trying to use kitchen login command mentioned on <a href="http://kitchen.ci/docs/getting-started/manually-verifying" rel="nofollow">this</a> page , it fails with 'No such file or directory - ssh' 
  My local system is Windows7, can anyone help please?</p>
  
  <p>C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/instance.rb:220:in <code>exec': No such file or directory - ssh (Errno::ENOENT
  )
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/instance.rb:220:in</code>login'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/command/login.rb:39:in <code>call'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/cli.rb:56:in</code>perform'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/cli.rb:224:in <code>login'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:27:in</code>run'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:in <code>invoke_command'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/cli.rb:308:in</code>invoke_task'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor.rb:359:in <code>dispatch'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/base.rb:440:in</code>start'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/bin/kitchen:13:in <code>block in &lt;top (required)&gt;'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/lib/kitchen/errors.rb:154:in</code>with_friendly_errors'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/gems/1.9.1/gems/test-kitchen-1.4.0/bin/kitchen:13:in <code>&lt;top (required)&gt;'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/bin/kitchen:23:in</code>load'
          from C:/Program Files (x86)/Heroku/ruby-1.9.3/bin/kitchen:23:in `'</p>