Logging formatting fix

+ indentation++
min/max/mean stats on assignement status page
Activities views refacto

- updated templates
- works with new roles (both Responsable & Volontaire)
- nice csv for everyone
- get_current_user_role() disappears
View: assignements per person

1 BRN view: lost of person - assignements count - total time.
A BRN user cas also see assignements of anyone.