Fix examples from README.md

[nokimaro]

Can you check/fix code examples of basic usage from README.md?

Error after updating to latest version via composer

php /home/www/yii watcher-daemon
PHP Fatal error:  Class console\controllers\WatcherDaemonController contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (vyants\daemon\controllers\WatcherDaemonController::getDaemonsList)

my WatcherDaemonController.php (based on readme example)

<?php

namespace console\controllers;

class WatcherDaemonController extends \vyants\daemon\controllers\WatcherDaemonController
{
    /**
     * @return array
     */
    protected function defineJobs()
    {
        sleep(1);

        $daemons = [
            ['className' => 'PostbackDaemonController', 'enabled' => true],
        ];
        return $daemons;
    }
}