Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

templates/Entry/_feed_link.html.twig

@@ -0,0 +1,14 @@
+{% if tag is defined %}
+    {% set feed_route = 'tag_feed' %}
+    {% set slug = tag.slug %}
+{% elseif current_route in ['homepage', 'unread', 'starred', 'archive', 'all'] %}
+    {% set feed_route = current_route %}
+    {% if current_route == 'homepage' %}
+        {% set feed_route = 'unread' %}
+    {% endif %}
+    {% set feed_route = feed_route ~ '_feed' %}
+    {% set slug = null %}
+{% endif %}
+{% if feed_route is defined %}
+    <a rel="alternate" type="application/atom+xml" href="{{ path(feed_route, {'username': app.user.username, 'token': app.user.config.feedToken, 'slug': slug}) }}" class="results-item"><i class="material-icons">rss_feed</i></a>
+{% endif %}