This update for tryton, trytond, trytond_currency, trytond_purchase, trytond_stock fixes the following issues:

Changes in tryton:

- Version 6.0.31 - Bugfix Release
- Version 6.0.30 - Bugfix Release
- Version 6.0.29 - Bugfix Release

Changes in trytond:

- Version 6.0.38 - Bugfix Release
- Version 6.0.37 - Bugfix Release
- Version 6.0.36 - Bugfix Release

Changes in trytond_currency:

- Version 6.0.5 - Bugfix Release
- Version 6.0.5 - Bugfix Release
- Version 6.0.5 - Bugfix Release
- Version 6.0.4 - Bugfix Release

Changes in trytond_purchase:

- Version 6.0.14 - Bugfix Release
- Version 6.0.13 - Bugfix Release
- Version 6.0.12 - Bugfix Release

Changes in trytond_stock:

- Version 6.0.23 - Bugfix Release
- Version 6.0.22 - Bugfix Release