Not so anonymous contact : email required.
Display email in contact detail page.
Merge pull request #207 from clacote/not-too-anonymous-contact

Not too anonymous contact : mandatory email
Trombinoscope : query
Trombinoscope page
Links to trombinoscope : on navbar, on dashboard.
Merge pull request #208 from clacote/trombinoscope

Trombinoscope : polaroïds of members I have linked and who bought a ticket.