title: Redmine agile plugin installation failure - No such file to load -- agile_data
body: <p>I have Redmine 2 on Ubuntu and want to install additional agile plugin. I have added redmine_agile folder downloaded from <a href="http://www.redminecrm.com/projects/agile/pages/1" rel="nofollow">http://www.redminecrm.com/projects/agile/pages/1</a> to /usr/share/redmine/lib/plugins and used commands:</p>
  
  <pre><code>sudo bundle install --without development test
  
  sudo bundle exec rake redmine:plugins NAME=redmine_agile RAILS_ENV=production
  </code></pre>
  
  <p>After last one, I get:</p>
  
  <pre><code>(in /usr/share/redmine)
  rake aborted!
  No such file to load -- agile_data
  
  Tasks: TOP =&gt; redmine:plugins:migrate =&gt; environment
  </code></pre>
  
  <p>How to solve this problem?</p>