i>updated options for <code>vis_cor</code> to use argument <code>na_action</code> not <code>use_op</code>.</li>
<li>cleaned up the organisation of the files and internal functions</li>
<li>Added appropriate legend and x axis for <code>vis_miss_ly</code> - thanks to Stuart Lee</li>
<li>Updated the <code>paper.md</code> for JOSS</li>
<li>Updated some old links in doco</li>
<li>Added Sean Hughes and Mara Averick to the DESCRIPTION with <code>ctb</code>.</li>
<li>Minor changes to the paper for JOSS</li>
</ul>
<