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

Changes in tryton:
- Version 6.0.50 - Bugfix Release

Changes in trytond:
- Version 6.0.60 - Bugfix Release
- Version 6.0.58 - Bugfix Release

Changes in trytond_party:
- Version 6.0.8 - Bugfix Release

Changes in trytond_purchase:
- Version 6.0.20 - Bugfix Release

Changes in trytond_stock:
- Version 6.0.32 - Bugfix Release