Update README for correct VXLAN port

fix typo

Do not process empty yaml objects (fixes #222)

Short port names for service load balancer

If a port name is longer than 15 characters we are unable to create
the associated service load balancer containers. Use our own short
name of `lb-port-{port}` to avoid naming issues.

For rancher/k3s/issues/90

k3s agent param `-u` is incorrect, use `-s`

Allow agent install

Add information on using the install script with environment variables
for defining desired download version, launch flags, agent install, and
install without downloads.

Assign default namespace if not set in manifests

Various helm fixes

Enable systemd ready notification for k3s server

Fix containerd debug log env var

Modify the install script to allow defining arbitrary service names and
commands for k3s.

Remove spurious error on start

Disables k8s generic api server systemd ready notification and send
our own ready notification after server available and kubeconfig
available.

Make sure we unset the NOTIFY_SOCKET environment variable by passing
`true` to SdNotify so the agent can start containers.

refactor: creates preloadImages function.

Add --service-cidr and --cluster-dns server args support

Fixup pr165

Document uninstall and Traefik, Helm integration (references #86, #96, #97)

Enforce lower case hostname for node