Added QueueManager to process background jobs

app/Job/EmailJob.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Kanboard\Job;
+
+/**
+ * Class EmailJob
+ *
+ * @package Kanboard\Job
+ * @author  Frederic Guillot
+ */
+class EmailJob extends BaseJob
+{
+    /**
+     * Set job parameters
+     *
+     * @access public
+     * @param  string $email
+     * @param  string $name
+     * @param  string $subject
+     * @param  string $html
+     * @param  string $author
+     * @return $this
+     */
+    public function withParams($email, $name, $subject, $html, $author)
+    {
+        $this->jobParams = array($email, $name, $subject, $html, $author);
+        return $this;
+    }
+
+    /**
+     * Execute job
+     *
+     * @access public
+     * @param  string $email
+     * @param  string $name
+     * @param  string $subject
+     * @param  string $html
+     * @param  string $author
+     */
+    public function execute($email, $name, $subject, $html, $author)
+    {
+        $this->logger->debug(__METHOD__.' Sending email to '.$email.' via '.MAIL_TRANSPORT);
+        $startTime = microtime(true);
+
+        $this->emailClient
+            ->getTransport(MAIL_TRANSPORT)
+            ->sendEmail($email, $name, $subject, $html, $author)
+        ;
+
+        if (DEBUG) {
+            $this->logger->debug('Email sent in '.round(microtime(true) - $startTime, 6).' seconds');
+        }
+    }
+}