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/search_form.html.twig

@@ -0,0 +1,17 @@
+<form class="input-field nav-panel-item nav-panel-search" style="display: none" name="search" method="GET" action="{{ path('search') }}">
+    {% if form_errors(form) %}
+        <span class="black-text">{{ form_errors(form) }}</span>
+    {% endif %}
+    <button type="submit" class="nav-form-button" aria-label="search"><i class="material-icons search" aria-hidden="true"></i></button>
+
+    {% if form_errors(form.term) %}
+        <span class="black-text">{{ form_errors(form.term) }}</span>
+    {% endif %}
+
+    <input type="hidden" name="currentRoute" value="{{ currentRoute }}" />
+
+    {{ form_widget(form.term, {'attr': {'autocomplete': 'off', 'placeholder': 'entry.search.placeholder'}}) }}
+    <i class="material-icons close" aria-label="clear" role="button"></i>
+
+    {{ form_rest(form) }}
+</form>