doc: add note on python3.6 issues

Author: Jim-Holmstroem

README.rst

@@ -102,3 +102,21 @@ More usage examples
 -------------------
 See the `documentation <https://pytorch-datastream.readthedocs.io/en/latest/>`_
 for more usage examples.
+
+
+Python 3.6 support
+==================
+Release `0.3.2` and later have a build specifically supporting `Python 3.6`.
+These builds can be found under the build name `+python3.6`. (E.g. `pytorch-datastream==0.3.2+python3.6`)
+The `Python 3.6` build is functionally equivalent however some of the type hinting was sacrificed to support `Python 3.6`.
+
+Releases prior to version `0.3.2` are wrongly marked as supported by `Python 3`.
+`Python 3.6` and older will crash on import of `pytorch-datastream` for those releases.
+
+Patch for Python 3.6
+--------------------
+To patch the code locally for `Python 3.6` run `patch-python3.6.sh`.
+
+.. code-block:: bash
+
+    $ ./patch-python3.6.sh