Add the backlink and the note layout

_layouts/note.html

@@ -0,0 +1,18 @@
+---
+layout: default
+---
+
+{{ content }}
+
+<div>
+    {% if page.backlinks.size > 0 %}
+    <h3>Notes mentioning this note</h3>
+    <div>
+        {% for backlink in page.backlinks %}
+        <div class="backlink-box">
+            <a class="internal-link" href="{{ site.baseurl }}{{ backlink.url }}{%- if site.use_html_extension -%}.html{%- endif -%}">{{ backlink.title }}</a><br>
+        </div>
+        {% endfor %}
+    </div>
+    {% endif %}
+</div>