Fix problem with site URL when creating settings
Fix problem with site URL when creating settings

If invoking the create_setting task directly and no site URL was explicitly
given, the settings file would have here a 'None'. Now we use localhost with
the default django port.

petervanderdoes/wger,rolandgeider/wger,wger-project/wger,DeveloperMal/wger,DeveloperMal/wger,DeveloperMal/wger,wger-project/wger,rolandgeider/wger,rolandgeider/wger,petervanderdoes/wger,kjagoo/wger_stark,wger-project/wger,kjagoo/wger_stark,kjagoo/wger_stark,wger-project/wger,DeveloperMal/wger,kjagoo/wger_stark,rolandgeider/wger,petervanderdoes/wger,petervanderdoes/wger