Add prev and next navigation

style.css

@@ -66,7 +66,7 @@ section {
 }
 
 article {
-  padding: 0 10px;
+  padding: 0 10px 50px 10px;
 }
 
 h1, h2, h3 {
@@ -76,6 +76,7 @@ h1, h2, h3 {
 
 h1 {
   font-size: 2em;
+  clear: both;
 }
 
 h2 {
@@ -98,6 +99,29 @@ p.imagetext {
   margin-bottom: 0.1em;
 }
 
+p.prevnext {
+  margin: 0;
+  a {
+    display: inline-block;
+  }
+  a.prev {
+    float: left;
+  }
+  a.prev:before {
+    content: '↫ ';
+  }
+  a.next {
+    float: right;
+  }
+  a.next:after {
+    content: ' ↬';
+  }
+}
+
+p.date {
+  margin: 0;
+}
+
 p.image {
   margin: 0;
   img {