Merge pull request #90 from clacote/fix/82-contact-antispam

Fix mix-it/linkit#82: captcha on contact message page.
About : removed Ludivine (no more badges on website), and Mathieu Calba (author of just one of dozens of others mobile apps)
Bios: Agnès.
Bios: Cédric.
Bios: i18n resources refactoring. Text justified.
Bios: removed Julien.
Bios: Alexis.
Bios: Cyril.
Bios: shorter Cédric.
Bios: Romain.
Bios: Franck.
Bios: Nicolas.
Bios: i18n.
Bios: img width styling.
Bios: EN translation when available.