Clawpack 5.13.0 released

[Randall J LeVeque]

Dear Clawpack Users,

We are happy to announce that Clawpack 5.13.0 has been released.

See the release notes for a summary of all changes:
  http://www.clawpack.org/release_5_13_0.html

A few highlights:

`src/geoclaw_riemann_utils.f90` was modified to improve the convergence rate on a smooth problem.  This does not seem to affect results in general, but may lead to slight differences in GeoClaw simulations since this affects the core Riemann solver used for shallow water equations.

Several bugs were also fixed in the Boussinesq (dispersive) version of GeoClaw, which may continue to evolve.

The NumFocus Code of Conduct has been adopted by the Clawpack project and a file describing this has been added to the top directory of many of the repositories.

There is a new `setrun.py` parameter,  

    `rundata.topo_data.override_order`
to allow more control over which topofile is used in regions of overlap.

General support was added for reading and interpolating storms from NetCDF data.

There are several other new features and bug fixes, please see the release notes for more details,
  http://www.clawpack.org/release_5_13_0.html.

There's also a new GeoClaw logo related to the Clawpack logo (see below!), and various versions of each can be downloaded from
    https://www.clawpack.org/logos.html
(Created with the generous support of graphic designers at NumFOCUS and the Flatiron Institute.)


How to get the latest version:
------------------------------

Please see
    http://www.clawpack.org/installing.html
for several installation options and the list of prerequisites.

A new tar file is available at:
    https://github.com/clawpack/clawpack/releases/

The tarfile is also permanently archived on Zenodo with DOI 10.5281/zenodo.16933803.  So if you publish results (and also, we hope, the code used to generate them) based on this version, you can rest assured that it will always be available to your readers.  For earlier versions, see
    http://www.clawpack.org/releases.html

Tar files for all recent releases can also now be referenced with the single DOI 10.17605/osf.io/kmw6h, convenient if you have used multiple versions in your work, or you want to cite a generic Clawpack DOI.   For more information on how best to cite Clawpack, please see
    http://www.clawpack.org/about.html#citing

Many thanks to everyone who contributed to this release. You can view all the commits, diffs, and contributors starting from the release notes page
    http://www.clawpack.org/release_5_13_0.html.

Happy Computing,
  The Clawpack Development Team