Vendor the external cookbooks

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

cookbooks/nginx/templates/default/modules/http_realip.conf.erb

@@ -0,0 +1,5 @@
+<% node['nginx']['realip']['addresses'].each do |address| -%>
+set_real_ip_from <%= address %>;
+<% end -%>
+real_ip_header <%= node['nginx']['realip']['header'] %>;
+real_ip_recursive <%= node['nginx']['realip']['real_ip_recursive'] %>;