Needed by the selinux feature source.
* Add rbac.yaml which contains needed rules for NFD to work on a RBAC enabled cluster * Add lines to templates to use the RBAC policy * Update README
* Re-order imports in main.go alphabetically * Refactor argument parsing * Run nfd periodically in a loop by default * Implement --sleep-interval command line option * Add template for running nfd as a Kubernetes DaemonSet
