README: releases section

As we ready for a draft release, verbiage is needed on what this
pre-release means.

Signed-off-by: Vincent Batts <[email protected]>

Author: vbatts

README.md

@@ -2,7 +2,6 @@
 
 This project is where the [Open Container Initiative](http://www.opencontainers.org/) Specifications are written.
 This is a work in progress.
-We should have a first draft by end of July 2015.
 
 Table of Contents
 
@@ -20,6 +19,11 @@ To provide context for users the following section gives example use cases for e
 
 - A user can create a root filesystem and configuration, with low-level OS and host specific details, and launch it as a container under an Open Container runtime.
 
+## Releases
+
+There is a loose [Road Map](https://github.com/opencontainers/specs/wiki/RoadMap:) on the wiki.
+During the `0.x` series of OCI releases we make no backwards compatibility guarantees and intend to break the schema during this series.
+
 # The 5 principles of Standard Containers
 
 Define a unit of software delivery called a Standard Container.