CakeResque - Class 'Resque' not found in app/Plugin/CakeResque/Lib/CakeResque.php on line 82

Question

http://cakeresque.kamisama.me/install#install

As instructed in the link above, I've been trying to install CakeResque plugin to CakePHP 2.7.10 with no luck. I'm getting the following error.

Fatal error: Class 'Resque' not found in /path/to/app/Plugin/CakeResque/Lib/CakeResque.php on line 82

I tried

php /usr/local/bin/composer.phar update

and

/usr/bin/composer self-update

and did not forget to add this to core.php.

require_once dirname(__DIR__) . '/Vendor/autoload.php';

I found the exactly same question at Stack Overflow, but mine is different because adding autoloader to core.php didn't work.

I use CentOS 6.7, php 5.6.15.