Added warning about 0.7.0

Lari Rasku · Lari Rasku · commit 9f1ddd1c1f4a · 2013-05-15T00:14:05.000+03:00
diff --git a/README.rst b/README.rst
@@ -1,3 +1,8 @@
+
+ WARNING: The `upcoming 0.7.0 release of docopts
+ <https://github.com/docopt/docopts/tree/develop>`_ will feature a completely
+ different user interface.  Prepare for script breakage.
+
 ================================================================================
  docopts
 ================================================================================
