osTicket v1.18.1

Improvements

• Update upgrade.php (9fd83eb)
• Update upgrade.inc.php (8c8a7fd)
• update: PHP Requirements 1.18.x (1c0c670)
• CLI: Make sure manage util can be executed via CLI (0caf586)
• Update raphael-min.js to 2.3.0 (d4aeada)
• cli: Class Not Found (4689926)