Misc release notes

Author: Carreau

docs/release.rst

@@ -5,6 +5,9 @@ Release notes
 Next release
 ------------
 
+
+This release will be the last to support Python 3.5, next version of Zarr will be Python 3.6+.
+
 * `DirectoryStore` now uses `os.scandir`, which should make listing large store
   faster, :issue:`563`
 
@@ -14,6 +17,8 @@ Next release
 * Fix minor bug in `N5Store`. 
   By :user:`gsakkis`, :issue:`550`.
 
+* add new `FSStore` to open any ``fsspec`` supported protocol :issue:`546`
+
 * Improve error message in Jupyter when trying to use the ``ipytree`` widget
   without ``ipytree`` installed.
   By :user:`Zain Patel <mzjp2>`; :issue:`537`