add license

_includes/page/explore.html

@@ -7,4 +7,5 @@
         {% endfor %}
 		<li class="categories__item"><a href="{{ '/' | prepend: site.baseurl }}">All</a></li>
     </ul>
+    <div class="explore__label">All content contained in this website is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">CC-BY 4.0</a> license.</div>
 </div>

_includes/post/about.html

@@ -4,4 +4,6 @@
         Written by the pseudonymous<strong> {% if page.author.fullname %} {{ page.author.fullname }} {% else %} {{ site.author.fullname }} {% endif %}</strong>
         on <strong>{{ page.date | date: "%d %B %Y" }}</strong>
     </div>
+    <div class="explore__label">All content contained in this website is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">CC-BY 4.0</a> license.</div>
 </div>
+