This update for tryton, trytond, trytond_account, trytond_purchase_request fixes the following issues:

Changes in trytond_purchase_request:

- Version 6.0.4 - Bugfix Release
- Version 6.0.3 - Bugfix Release

Changes in trytond_account:

- Version 6.0.15 - Bugfix Release
- Version 6.0.14 - Bugfix Release

Changes in trytond:

- Version 6.0.28 - Bugfix Release
- Version 6.0.27 - Bugfix Release

Changes in tryton:

- Version 6.0.25 - Bugfix Release
- Version 6.0.24 - Bugfix Release