Add arrow keys support

public_html/js/Presenters/PagerPresenter.js

@@ -62,8 +62,8 @@ App.Presenters.PagerPresenter = function(
             .fail(loaded);
 
         if (!endlessScroll) {
-            keyboard.keydown('a', navigateToPrevPage);
+            keyboard.keydown(['a', 'left'], navigateToPrevPage);
-            keyboard.keydown('d', navigateToNextPage);
+            keyboard.keydown(['d', 'right'], navigateToNextPage);
         }
     }
 

public_html/js/Presenters/PostPresenter.js

@@ -92,25 +92,25 @@ App.Presenters.PostPresenter = function(
                 if (nextPostUrl) {
                     $nextPost.addClass('enabled');
                     $nextPost.attr('href', nextPostUrl);
-                    keyboard.keyup('a', function() {
+                    keyboard.keyup(['a', 'left'], function() {
                         router.navigate(nextPostUrl);
                     });
                 } else {
                     $nextPost.removeClass('enabled');
                     $nextPost.removeAttr('href');
-                    keyboard.unbind('a');
+                    keyboard.unbind(['a', 'left']);
                 }
 
                 if (prevPostUrl) {
                     $prevPost.addClass('enabled');
                     $prevPost.attr('href', prevPostUrl);
-                    keyboard.keyup('d', function() {
+                    keyboard.keyup(['d', 'right'], function() {
                         router.navigate(prevPostUrl);
                     });
                 } else {
                     $prevPost.removeClass('enabled');
                     $prevPost.removeAttr('href');
-                    keyboard.unbind('d');
+                    keyboard.unbind(['d', 'right']);
                 }
             }).fail(function() {
             });

public_html/templates/help.tpl

@@ -60,7 +60,7 @@
             </tr>
 
             <tr>
-                <td><code>[A]</code> and <code>[D]</code></td>
+                <td><code>[A]</code> and <code>[D]</code><br/><code>[Left]</code> and <code>[Right]</code> arrow keys</td>
                 <td>Go to newer/older page or post</td>
             </tr>