Added method generators_select_by_trending.
Added method generators_select_related_by_display_name.
Fixed 'q' as positional argument in method 'generators_search'.
Fix.
Added method 'generator_select_by_url_name_or_generator_id'.
Added method 'instances_select_by_new'.
pep8
Added method 'instance_select'.
Added method 'content_flag_create'.
Added method 'instance_create'.
Added language_code='en' by default.
Better response handling. New exception. Fixes, cleanup.