Index: fix informations

- reduction amount
- guaranteed free time
Sweatshirt for everyone!

DB Schema changed

Sweatshirt choosing improved:
- everyone can have a sweatshirt!
- stocks limit for volontaires, set through the config
- stocks management
- types as String in sq
- no more Sweat enum
- disponibilites in profil() view if facultative -> user role management
- profil() view got massively rewritten in the end
Fix sexe management in profile
BRN auto-detection in registration API
BRN Blueprint registered
Registration API: model could be not instantiated
Merge branch 'api'
sweat view for BRN
login: better logging