Deletion of django python compressor

Because we use Jessie, the package python3-django-compressor doesn't
exist. It's not critical at this stage of developement so I'm removing
it.

Signed-off-by: Matthieu Berjon <matthieu.berjon@inria.fr>

django/requirements.txt

 Django==1.11
-django-compressor==2.2
 mysqlclient==1.3.12

django/templates/base.html

@@ -12,9 +12,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no">
 
     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
-    {% compress css %}
-      <link rel="stylesheet" type="text/css"  href="{% static 'css/allgo.css' %}" media="all" charset="utf-8">
-    {% endcompress %}
+    <link rel="stylesheet" type="text/css"  href="{% static 'css/allgo.css' %}" media="all" charset="utf-8">
 
   </head>