docs(production-ready): explain the state of etcd clearly

Documentation/production-ready.md

@@ -0,0 +1,7 @@
+ectd is being used successfully by many companies in production. It is,
+however, under active development and systems like etcd are difficult to get
+correct. If you are comfortable with bleeding-edge software please use etcd and
+provide us with the feedback and testing young software needs.
+
+When the etcd team feels confident removing this warning we will release etcd
+1.0.

README.md

@@ -18,6 +18,8 @@ Or feel free to just use curl, as in the examples below.
 [raft]: http://raftconsensus.github.io/
 [etcdctl]: http://github.com/coreos/etcdctl/
 
+If you're considering etcd for production use, please see: [production-ready.md](./Documentation/production-ready.md)
+
 ## Getting Started
 
 ### Getting etcd