Feature implementation

- Minor changes to existing templates
- Implement welcome e-mail

Signed-off-by: Marcel Oomens <Marcel.Oomens@cromido.org>
Bug fixes

Signed-off-by: Marcel Oomens <Marcel.Oomens@cromido.org>
Fix requirements.txt

Signed-off-by: Marcel Oomens <Marcel.Oomens@cromido.org>
Bug fixes

Signed-off-by: Marcel Oomens <Marcel.Oomens@cromido.org>
Bug fixes

Still struggling with the callback...

Signed-off-by: Marcel Oomens <Marcel.Oomens@cromido.org>