message: DOC: clarify process for release tarballs
  Add info about supplying the "--with-data" flag to the
  script that generates release tarballs to generate a
  corresponding tarball consisting of the associated
  data for the release.
diff: @@ -113,10 +113,11 @@ approved. At this point, the release candidate branch can be deleted.
  5: Make a Release Tarball
  ^^^^^^^^^^^^^^^^^^^^^^^^^^
  -* Checkout the master branch locally and run the ``axom/scripts/make_release_tarball.sh``
  - script. This will generate a tarball of the form ``Axom-v0.3.1.tar.gz``
  +* Checkout the master branch locally and run ``axom/scripts/make_release_tarball.sh --with-data``
  + This will generate a two tarballs of the form ``Axom-v0.3.1.tar.gz`` and ``AxomData-v0.3.1.tar.gz``
  + each consistsing of the axom source and data respectively.
  -* Upload the tarball for the corresponding release, by going to the
  +* Upload the tarballs for the corresponding release, by going to the
  `Github Releases section <https://github.com/LLNL/axom/releases>`_ and ``Edit``
  the release created earlier.
  