dav_submission: added email notification, zip-download and permission

check.

dav_submission/django_project_config/settings-dav_submission.py

@@ -2,8 +2,10 @@
 import os
 from django.conf import settings
 
+# NOTIFY_ADDRESS = 'webmaster@alpenverein-karlsruhe.de'
 # UPLOAD_PATH = os.path.join(settings.BASE_VAR_DIR, 'lib', 'dav_submission', 'submissions')
-MAX_FILES = 5
+# MAX_FILES = 5
 # MAX_FILE_SIZE_MIB = 50
 # MAX_TOTAL_SIZE_MIB = 100
-# METADATA_FILE_NAME = 'metadata.txt'
+# METADATA_FILE_NAME = 'metadata.txt'
+# CACHED_ZIP_FILE_NAME = '.cache.zip'