Added `--no-style` option to `BaseCommand` to avoid using output styles.
Fixed default value to boolean `False`.
Fixed some `admin_scripts` regression tests for the new option.
Fixed setting the `no_style()` mode in the `execute()` method.
Added documentation for new command option.
Added unit test for management command argument `--no-style`.
Added unit test for management command argument `--no-style`.
Merge branch 'master' of github.com:jose-lpa/django
Added unit test for management command argument `--no-style`.
Merge branch 'master' of github.com:jose-lpa/django
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
`GenericRelationsTests.test_generic_relations` test case splitted into
several unitary cases.
Splitted another specific test case and comments cleaned up.
Refactored lambda function to retrieve tags list.