Make figcaption visible

Makes the figcaption Element for the post.html Template visible.

The figcaption content is now overlayed translucently on top of the image having the maximum width of one row. On hover it will expand to the full necessary height to display the whole content.

templates/blog/post.html

@@ -11,9 +11,11 @@
     <div class="column is-one-quarter">
       <div class="card">
         <div class="card-image">
-          <figure class="image is-4by3">
+          <figure>
             {% set image = resize_image(path="@/" ~ post.colocated_path ~ "/" ~ post.extra.depiction.image, width=800, height=600) -%}
-            <img src="{{ image.url }}" alt="{{ post.extra.depiction.alt }}" />
+            <div class="image is-4by3">
+              <img src="{{ image.url }}" alt="{{ post.extra.depiction.alt }}" />
+            </div>
             {% if post.extra.depiction.credits %}
               <figcaption>{{ post.extra.depiction.credits }}</figcaption>
             {% endif %}