document the etcd dependency after the pull request

Author: garethr

Gemfile

@@ -2,5 +2,6 @@ source "http://rubygems.org"
 
 
 gem "rake"
+gem "etcd"
 gem "puppet", ENV['PUPPET_VERSION'] || '~> 3.2.0'
 gem "puppetlabs_spec_helper"

README.md

@@ -1,5 +1,11 @@
 [etcd](https://github.com/coreos/etcd) is a highly-available key value store for shared configuration and service discovery. Hiera-etcd provides a Hiera backend which allows for specifying multiple etcd paths from which data can be collected and easily inserted into Puppet manifests.
 
+## Prerequisites
+
+You'll need the [etcd](https://github.com/ranjib/etcd-ruby) gem
+installed. Potentially with `gem install etcd`
+
+
 ## Configuration
 
 The following hiera.yaml should get you started.
@@ -15,15 +21,6 @@ The following hiera.yaml should get you started.
         - /configuration/common
 
 
-## Outstanding
-
-* No support for HTTPS yet
-* No support for etcd server disappearing
-* No tests
-
-I'll likely swap out the Net::HTTP implementation for one using [etcd-rb](https://github.com/iconara/etcd-rb) which should make doing the right thing easier.
-
-
 ## Thanks
 
 The starting point for this backend was the [hiera-http](https://github.com/crayfishx/hiera-http) backend from @crayfishx.