rename main code directory

bookwyrm/templates/snippets/username.html

@@ -0,0 +1,2 @@
+{% load fr_display %}
+<a href="/user/{{ user | username }}" class="user">{% if user.name %}{{ user.name }}{% else %}{{ user | username }}{% endif %}</a>{% if possessive %}'s{% endif %}{% if show_full and user.name or show_full and user.localname %} ({{ user.username }}){% endif %}