Refresh documentation

* Drop the existing examples.  There is now better documentation
  linked linked under the docs.html page.
* Move the Lustre links down under 'Community Resources' from the
  main index.html page.
* Refresh the Lustre.html page to reflect the current ZFS Lustre
  server status.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>