edit release notes

Author: alimanfoo

docs/release.rst

@@ -7,12 +7,12 @@ Release notes
 -----
 
 * Group objects now support member deletion via ``del`` statement
-  ('#65 <https://github.com/alimanfoo/zarr/issues/65>'_)
+  ('#65 <https://github.com/alimanfoo/zarr/issues/65>'_).
 * Added :class:`zarr.storage.TempStore` class for convenience to provide
   storage via a temporary directory
-  (`#59 <https://github.com/alimanfoo/zarr/issues/59>`_)
-* Fixed performance issues with ``ZipStore`` class
-  (`#66 <https://github.com/alimanfoo/zarr/issues/27>`_)
+  (`#59 <https://github.com/alimanfoo/zarr/issues/59>`_).
+* Fixed performance issues with :class:`zarr.storage.ZipStore`` class
+  (`#66 <https://github.com/alimanfoo/zarr/issues/27>`_).
 * The Blosc extension has been modified to return bytes instead of array
   objects from compress and decompress function calls. This should
   improve compatibility and also provides a small performance increase for