Add POPL'19 paper

(...finally, Simon writes a Links paper!)

Author: SimonJF

index.html

@@ -89,6 +89,11 @@ <h2>About Links</h2>
       <section class="publications-section">
         <h2>Publications</h2>
         <ul>
+          <li>
+            <a href="http://www.simonjf.com/writing/zap.pdf">Exceptional Asynchronous Session Types: Session Types without Tiers</a>.
+            Simon Fowler, Sam Lindley, J. Garrett Morris, and S&aacute;ra Decova.
+            <a href="http://popl19.sigplan.org/">POPL 2019</a>.
+          </li>
           <li> 
 	    <a href="http://homepages.inf.ed.ac.uk/slindley/papers/shallow-extended.pdf">Shallow Effect Handlers</a>.
 	    Daniel Hillerstr&ouml;m and Sam Lindley.