Install redmine:

  - Add user for redmine operation: redmine
  - Install Ruby and dependent Ruby gems.
  - Configure MySQL.
  - Install the Redmine.
  - Install the unicorn setting files.
  - Nginx configurations
  - Deploy the init script for redmine

      Put an init script for redmine onto /etc/init.d/.
      Execute update-rc.d command and thus enabling the redmine service.
      Finally, use service resource to ensure that redmine service starts and is enabled.

      see: https://gist.github.com/mguterl/308216
           http://www.redmine.org/boards/1/topics/9334
Merge branch 'redmine'