Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/compat_resource/files/lib/chef_compat/mixin/properties.rb

@@ -0,0 +1,8 @@
+require 'chef_compat/monkeypatches'
+require 'chef_compat/copied_from_chef/chef/mixin/properties'
+
+module ChefCompat
+  module Mixin
+    Properties = ChefCompat::CopiedFromChef::Chef::Mixin::Properties
+  end
+end