tracer-0.6.12-1

• Add Vagrantfile for more convenient testing
• Recommend systemctl instead of service on systemd machines (@sean797)
• Implement --now and --packages as API Query methods
• Improve support for python applications (Fix #64)
• Add support for Arch Linux ARM (tilo-brueckner[at]blueperil[dot]de)
• Add support for RHEL (@gholms)
• Add support for Mageia (@Conan-Kudo)