rouster-0.65

• add support for user_data in OpenStack machines
• update os_type to handle /etc/os-release on RHEL vs. Debian systems
• add os_version
• update restart so that appropriate mechanism/exit code used on RHEL 6 vs. 7 (see #102)
• update get_services to support systemv
• fix bug related to vagrant ~ 1.8.5 SSH-key handling on systems that had also used vagrant < 1.5