renamed settings.default_basedir to basedir
renamed settings default_cache to cache
renamed settings default_chdir to chdir
renamed settings default_exclude to exclude
renamed settings default_fallback to fallback
renamed settings default_file to file
renamed settings default_main_module_name to main_module_name
renamed settings default_names to names
renamed settings default_recursively to recursively
renamed settings default_strict to strict
renamed settings default_tags to tags
removed settings default_arguments