Better branching/handling of Debian vs. Ubuntu

* VisualVM is installed from a binary using Ansible.
* There's a new system function to determine if we're on Ubuntu.
* If we're on Ubuntu, do some special moves.
* Installing a base set of Torquebox dependencies is handled via Ansible, the final part (sticking Torquebox into /opt, doing the profile boogie etc.) is handled via debuntu.