Add a few things

static/jon.css

@@ -0,0 +1,15 @@
+body {
+    font-family: Arial, Helvetica, sans-serif;
+}
+
+table {
+    border-collapse: collapse;
+}
+
+th, td {
+    padding: .2em .4em;
+}
+
+tr:not(:first-child):hover, tbody tr:hover {
+    background-color: lightblue;
+}