Add basic UI templates.

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>

wallabag_kindle_consumer/templates/relogin.html

@@ -0,0 +1,25 @@
+{% extends 'base.html' %}
+
+{% import 'macros.html' as forms %}
+
+{% block body %}
+
+    <div class="card">
+        <div class="card-header">Fetch a new Wallabag API token</div>
+        <div class="card-body">
+            <form>
+                <div class="row">
+                    {{ forms.input('user', "Username", description='Your wallabag username at ' + wallabag_host) }}
+                    {{ forms.input('password', "Password", type='password', description='Your wallabag password at ' + wallabag_host + ". The password will not be stored") }}
+                </div>
+
+                <div class="row">
+                    <div class="col-lg">
+                        <button type="submit" class="btn btn-primary">Register</button>
+                    </div>
+                </div>
+            </form>
+        </div>
+    </div>
+
+{% endblock %}