update

Author: jswhit

Changelog

@@ -1,8 +1,9 @@
  version 1.2.8 (not yet released)
 =================================
  * recognize _Unsigned attribute used by netcdf-java to designate unsigned
-   integer data stored with a signed integer type in netcdf-3.
+   integer data stored with a signed integer type in netcdf-3 (issue #656).
  * add Dataset init memory parameter to allow loading a file from memory
+   (pull request #652).
  * fix for negative times in num2date (issue #659).
  * fix for failing tests in numpy 1.13 due to changes in numpy.ma (issue #662).