message: Add a caveat about make_initiliazable_iterator to the README.
diff: @@ -130,6 +130,8 @@ adjusting your learning rate or batch size according to the number of GPUs.
  We are working on addressing this limitation by splitting each batch across GPUs
  instead.
  * PartitionedVariables are not supported yet.
  +* Input pipelines with Datasets that capture stateful objects and rely on
  +`make_initializable_iterator` are not supported yet.
  ## What's next?
  