VNC AuthProxy runit script

These commits resolve #3 by adding a runit script to the default cookbook. 
I was going based on the existing boolean in the cookbook ``['ganeti_webmgr']['migrate']``. in ``recipes/default.rb``, the migrate command is run ``only_if { !!node['ganeti_webmgr']['migrate'] }``.  Regardless, I've changed it and will send in the few final changes.