django3 compatibility and links in comments

.gitmodules

 [submodule "media"]
 	path = media
 	url = https://git.mount-mockery.de/pylib/media.git
+[submodule "stringtools"]
+	path = stringtools
+	url = https://git.mount-mockery.de/pylib/stringtools

main/asgi.py

+"""
+ASGI config for main project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.0/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'main.settings')
+
+application = get_asgi_application()

main/settings.py

 """
 Django settings for this project.
 
-Generated by 'django-admin startproject' using Django 2.2.3.
+Generated by 'django-admin startproject' using Django 3.0.3.
 
 For more information on this file, see
-https://docs.djangoproject.com/en/2.2/topics/settings/
+https://docs.djangoproject.com/en/3.0/topics/settings/
 
 For the full list of settings and their values, see
-https://docs.djangoproject.com/en/2.2/ref/settings/
+https://docs.djangoproject.com/en/3.0/ref/settings/
 """
 
 import config
     setattr(thismodule, property_name, value)
 
 # Quick-start development settings - unsuitable for production
-# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
+# See https://docs.djangoproject.com/en/3.0/howto/deployment/checklist/
 
 # SECURITY WARNING: keep the secret key used in production secret!
 #
 
 # SECURITY WARNING: don't run with debug turned on in production!
 #
-DEBUG = False
+DEBUG = True
 
 
 # Application definition
 
 
 # Database
-# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
+# https://docs.djangoproject.com/en/3.0/ref/settings/#databases
 #
 DATABASES = {
     'default': {
 
 
 # Password validation
-# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
+# https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators
 #
 AUTH_PASSWORD_VALIDATORS = [
     {
 
 
 # Internationalization
-# https://docs.djangoproject.com/en/2.2/topics/i18n/
+# https://docs.djangoproject.com/en/3.0/topics/i18n/
 #
 LANGUAGE_CODE = 'en-us'
 LANGUAGES = [
 
 
 # Static files (CSS, JavaScript, Images)
-# https://docs.djangoproject.com/en/2.2/howto/static-files/
+# https://docs.djangoproject.com/en/3.0/howto/static-files/
 #
 STATIC_ROOT = os.path.join(BASE_DIR, 'data', 'static')
 STATIC_URL = '/static/'

main/urls.py

 """Project URL Configuration
 
 The `urlpatterns` list routes URLs to views. For more information please see:
-    https://docs.djangoproject.com/en/2.2/topics/http/urls/
+    https://docs.djangoproject.com/en/3.0/topics/http/urls/
 Examples:
 Function views
     1. Add an import:  from my_app import views

main/wsgi.py

 It exposes the WSGI callable as a module-level variable named ``application``.
 
 For more information on this file, see
-https://docs.djangoproject.com/en/2.2/howto/deployment/wsgi/
+https://docs.djangoproject.com/en/3.0/howto/deployment/wsgi/
 """
 
 import os

requirements.txt

-Django>=2.0.5,<3.0
+Django>=2.0.5
 Pillow>=5.4.1
 python-creole>=1.0.0
 Whoosh>=2.4.0

stringtools

+Subproject commit a12e00bb8152af3863370d1c9b3fcadc8ddae31a

themes

-Subproject commit a24e772083b27e9ab413d137005dbc9e8325dbc4
+Subproject commit b0106a3d5cc302844dacc681f75f047876525e5e