0.5

 * Accept docker container cgroups in various formats
 * Don't display null everywhere on Services page
 * Only run one cockpit-agent process per host/user
 * Don't require both memory/cpuacct cgroups to display container graphs
 * More tolerant of running with selinux enabled (not yet completely fixed)
 * Better detection of cgroup unlimited memory amounts
 * A real terminal on the rescue terminal page
 * Lots of other refactoring, infrastructure, and bug fixes
 * Build fixes