Add marging to reference entries

Author: susannasiebert

assets/style_ITN.css

@@ -548,4 +548,10 @@ a.anchor:hover {
   font-family: "Lora", serif;
   font-size: .85em;
   color: #193a5c;
-}
+}
+
+/* Reference List Entry */
+
+div.cls-entry {
+  margin-bottom: 0.85em; /* adds same amount of margin as a <p> would */
+}