Small-small-hr

What’s Changed

* Add django model reviews (34) moshthepitt
* Upgrade packages (33) moshthepitt

- Add MANIFEST.in

- More generic send_email function

- Fix migrations
- Update packages

Fix name in application emails 27

- Make it possible to reject applications when an overlapping approved object already exists https://github.com/moshthepitt/small-small-hr/pull/25
- Add email templates for application emails https://github.com/moshthepitt/small-small-hr/pull/25