Make a note about go 1.1

README.md

@@ -4,7 +4,7 @@
 
 ### Building
 
-etcd is installed like any other Go binary. The steps below will put everything into a directory called etcd.
+etcd is installed like any other Go (golang >= 1.1) binary. The steps below will put everything into a directory called etcd.
 
 ```
 mkdir etcd