Vendor the external cookbooks

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

cookbooks/compat_resource/README.md

@@ -0,0 +1,60 @@
+# compat_resource cookbook
+
+[![Build Status](https://travis-ci.org/chef-cookbooks/compat_resource.svg?branch=master)](https://travis-ci.org/chef-cookbooks/compat_resource) [![Cookbook Version](https://img.shields.io/cookbook/v/compat_resource.svg)](https://supermarket.chef.io/cookbooks/compat_resource)
+
+This cookbook backports functionality introduced in the latest chef-client releases to any chef-client from 12.1 onwards. This includes [Custom Resource](https://docs.chef.io/custom_resources.html) functionality, notification improvements, as well as new resources added to core chef. It allows for the usage of these new resources in cookbooks without requiring the very latest Chef client release.
+
+## Backported functionality
+
+- [Custom Resources](https://docs.chef.io/custom_resources.html)
+- [apt_repository](https://docs.chef.io/resource_apt_repository.html)
+- [apt_update](https://docs.chef.io/resource_apt_update.html)
+- [systemd_unit](https://docs.chef.io/resource_systemd_unit.html)
+- [yum_repository](https://docs.chef.io/resource_yum_repository.html)
+- [:before notifications](https://docs.chef.io/resources.html#timers)
+
+## Requirements
+
+### Platforms
+
+- All platforms supported by Chef
+
+### Chef
+
+- Chef 12.1+
+
+### Cookbooks
+
+- none
+
+## Usage
+
+To use this cookbook, put `depends 'compat_resource'` in the metadata.rb of your cookbook. Once this is done, you can use all the new custom resource features to define resources. It Just Works.
+
+## Custom Resources?
+
+Curious about how to use custom resources?
+
+- Docs: <https://docs.chef.io/custom_resources.html>
+- Slides: <https://docs.chef.io/decks/custom_resources.html>
+
+## License & Authors
+
+- Author:: Lamont Granquist ([lamont@chef.io](mailto:lamont@chef.io))
+- Author:: John Keiser ([jkeiser@chef.io](mailto:jkeiser@chef.io))
+
+```text
+Copyright:: 2015-2016 Chef Software, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```