Updated to recent versions of Ubuntu and OTRS Help Desk

* Ubuntu 13.10 is now the base system
* Updated to OTRS Help Desk 3.3.6
* Updated to Apache 2.4 and PHP 5.5
* Switched from MySQL 5.5 to MariaDB 10.0
* Added more automatation to system setup
* Added setup for OTRS' cron jobs and scheduler

Still working on a deployment for OTRS-Extension-ReferenceIDoitObjects...