runner: Properly forward all unknown commands to django-admin.py
runner: Saner yes/no handling.
runner: Use a non-conflicting string formatting the random SECRET_KEY
runner: Exit with code 2 when we are prevented from overwriting the config file
requirements: Bump django-assets to 0.10

According to @julen, 0.8 is buggy and problematic.
See miracle2k/django-assets#12 and miracle2k/django-assets#39
landscape: custom settings