title: sidekiq error when deploy with capistrano
body: <p>I have some problem when I trying to deploy Sinatra and sidekiq with capistrano.</p>
  
  <p>In mygem file : </p>
  
  <pre><code>gem 'capistrano-sidekiq' , github: 'seuros/capistrano-sidekiq'
  
  Capfile:
  require 'capistrano/sidekiq'
  
  Gemfile.lock
  capistrano-sidekiq (0.3.3)
  
  sidekiq (3.2.0)
  </code></pre>
  
  <p>Error when deployed:</p>
  
  <pre><code>**Don't know how to build task 'restart'**
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/lib/capistrano/dsl/task_enhancements.rb:10:in `after'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/tasks/sidekiq.cap:22:in `block in &lt;top (required)&gt;'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/tasks/sidekiq.cap:18:in `&lt;top (required)&gt;'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/sidekiq.rb:2:in `load'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/sidekiq.rb:2:in `&lt;top (required)&gt;'
  /home/ubuntu/projects/feed_bidder/feed_bidder_offline/Capfile:6:in `require'
  /home/ubuntu/projects/feed_bidder/feed_bidder_offline/Capfile:6:in `&lt;top (required)&gt;'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/lib/capistrano/application.rb:22:in `load_rakefile'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/lib/capistrano/application.rb:12:in `run'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/bin/cap:3:in `&lt;top (required)&gt;'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/bin/cap:23:in `load'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/bin/cap:23:in `&lt;main&gt;'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `eval'
  /home/ubuntu/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `&lt;main&gt;'
  </code></pre>
  
  <p>Also when I try to deploy via <code>cap production sidekiq:start -T</code></p>