major styling pass, artist list, and import processing improvements

app/templates/gallery.html

@@ -8,18 +8,15 @@
   {% for image in images %}
   <div class="gallery-item">
     <div class="gallery-thumb img-clickable"
-        data-full="{{ url_for('static', filename=image.filepath) }}"
-        style="background-image: url('{{ url_for('static', filename=image.filepath) }}');"
-        data-full="{{ url_for('static', filename=image.filepath) }}"
+        data-full="{{ url_for('main.serve_image', filename=image.filepath | replace('/images/', '')) }}"
+        style="background-image: url('{{ url_for('main.serve_image', filename=image.filepath | replace('/images/', '')) }}');"
         data-filename="{{ image.filename }}">
     </div>
     <a href="{{ url_for('main.artist_gallery', artist_name=image.artist) }}">{{ image.artist }}</a>
     <span class="image-date">
-        {{ image.taken_at or image.imported_at | datetimeformat }}
+        {{ (image.taken_at or image.imported_at) | datetimeformat }}
     </span>
   </div>
   {% endfor %}
 </div>
-
-
 {% endblock %}