Moved local settings in separate file

Created sample file for local settings
Ignore local_settings.py
Created sample settings file for production environments
Delete local_settings.py
Catch import error of local settings
Resolved circular import issue with Python 3.
MIDDLEWARE_CLASSES can be loaded from settings with module.
It is possible in the old way, but only if the import is splitted.
Merge pull request #5 from Eldorado234/feature/2_split_settings

Split settings #2