Vendor the external cookbooks

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

cookbooks/elasticsearch/libraries/resource_plugin.rb

@@ -0,0 +1,19 @@
+# Chef Resource for installing an elasticsearch plugin
+class ElasticsearchCookbook::PluginResource < Chef::Resource::LWRPBase
+  resource_name :elasticsearch_plugin
+  provides :elasticsearch_plugin
+
+  include ElasticsearchCookbook::Helpers
+
+  actions(:install, :remove)
+  default_action :install
+
+  # if the name or url are different from the resource name
+  attribute(:plugin_name, kind_of: String, name_attribute: true)
+  attribute(:url, kind_of: String, default: nil)
+  attribute(:chef_proxy, kind_of: [TrueClass, FalseClass], default: false)
+  attribute(:options, kind_of: String, default: '')
+
+  # this is what helps the various resources find each other
+  attribute(:instance_name, kind_of: String, default: nil)
+end