Restructure Alliance Auth package (#867)

* Refactor allianceauth into its own package

* Add setup

* Add missing default_app_config declarations

* Fix timerboard namespacing

* Remove obsolete future imports

* Remove py2 mock support

* Remove six

* Add experimental 3.7 support and multiple Dj versions

* Remove python_2_unicode_compatible

* Add navhelper as local package

* Update requirements

allianceauth/authentication/templates/registration/registration_form.html

@@ -0,0 +1,14 @@
+{% extends 'public/middle_box.html' %}
+{% load bootstrap %}
+{% load i18n %}
+{% load static %}
+{% block title %}Register{% endblock %}
+{% block middle_box_content %}
+    <form class="form-signin" role="form" action="" method="POST">
+        {% csrf_token %}
+        {{ form|bootstrap }}
+        <br/>
+        <button class="btn btn-lg btn-primary btn-block" type="submit">{% trans "Submit" %}</button>
+        <br/>
+    </form>
+{% endblock %}