Django-boost

- Fix
- error in template `alive` filter.

- Add
- `django_boost.models.mixins.LogicalDeletionMixin`
- `django_boost.admin.LogicalDeletionModelAdmin`
- `django_boost.validators.ContainAnyValidator`
- Update
- `django_boost.admin.sites.register_all` allow options argument.

- Update
- some translation updates
- `support_heroku` command messages

- Update
- some translation updates

- Add
- `django_boost.middleware.SpaceLessMiddleware`

- Fix
- on support_heroku command duplicated gunicorn