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.

assets/themes/material/css/print.scss

@@ -0,0 +1,70 @@
+@media print {
+  /* ### Layout ### */
+
+  body {
+    font-family: serif;
+    background-color: #fff;
+  }
+
+  @page {
+    margin: 1cm;
+  }
+
+  img {
+    max-width: 100% !important;
+  }
+
+  /* ### Content ### */
+
+  /* Hide useless blocks */
+  body > header,
+  body > footer,
+  .entry-tools,
+  header div,
+  .messages,
+  .entry + .results,
+  .left-bar,
+  .progress,
+  .hide-on-large-only,
+  .entry-info,
+  .title-edit {
+    display: none !important;
+  }
+
+  main {
+    padding-left: 0 !important;
+  }
+
+  .article {
+    margin: inherit !important;
+  }
+
+  article {
+    border: none !important;
+  }
+
+  /* Add URL after links */
+  .vieworiginal a::after {
+    content: " (" attr(href) ")";
+  }
+
+  /* Add explanation after abbr */
+  abbr[title]::after {
+    content: " (" attr(title) ")";
+  }
+
+  /* Change border on current pager item */
+  .pagination span.current {
+    border-style: dashed;
+  }
+
+  #main {
+    width: 100%;
+    margin: 0;
+    padding: 0;
+  }
+
+  #article {
+    width: 100%;
+  }
+}