add support for isso gravatar

see: isso-comments/isso#317

config.js

@@ -72,11 +72,16 @@ module.exports = {
             embed: 'https://isso.rocka.me/js/embed.min.js',
             // Isso usually detects the REST API automatically, but when you serve the JS script on a different location,
             // this may fail. Use data-isso to override the API location.
-            prefix: '',
+            prefix: 'https://isso.rocka.me',
             // Enable or disable voting feature on the client side.
             vote: true,
             // Enable or disable avatar generation.
             avatar: true,
+            // Uses gravatar images instead of generating svg images.
+            // You have to set `isso.avatar` to false when you want to use this,
+            // otherwise both the gravatar and avatar svg image will show up.
+            // Please also set option "gravatar" to true in the server configuration.
+            gravatar: false,
             // Number of comments to reveal on clicking the “X Hidden” link.
             reveal: 5,
             // Set to true when spam guard is configured with require-author = true.
@@ -87,7 +92,7 @@ module.exports = {
             replySelf: false,
             // Number of top level (or nested) comments to show by default.
             // If some comments are not shown, an “X Hidden” link is shown.
-            maxCommentsTop: 10,
+            maxCommentsTop: 1,
             maxCommentsNested: 5
         }
     }

template/assets/isso.css

@@ -100,12 +100,16 @@
 }
 
 .isso-thread .isso-comment .avatar {
-    width: 40px;
-    height: 40px;
     float: left;
     margin-right: 0.83rem;
 }
 
+.isso-thread .isso-comment .avatar,
+.isso-thread .isso-comment .avatar img {
+    width: 40px;
+    height: 40px;
+}
+
 .isso-thread .isso-comment .isso-comment-header {
     line-height: 40px;
 }

template/isso.pug

@@ -11,5 +11,6 @@ script(
     data-isso-max-comments-nested=(isso.maxCommentsNested == 5 ? false : isso.maxCommentsNested)
     data-isso-reveal-on-click=(isso.reveal == 5 ? false : isso.reveal)
     data-isso-avatar=(isso.avatar === false ? "false" : false)
+    data-isso-gravatar=(isso.gravatar === true ? "true" : false)
     data-isso-vote=(isso.vote === false ? "false" : false)
 )