Merge pull request #58 from tyx/migrate_to_sf2_3

fix typo
Fix Formating article 16
fix broken link
fix broken link²
Jour 17
Logo Vagrant plus petit
Repair config file inconsistencies in preprod env
Correction de l'erreur d'avatar et rajout de l'extract
Correction des images
Corrections après relecture en preprod 1
Modifications après relecture en preprod 2
Corrections après relecture en preprod 3
Small corrections in deployment Fabfile
Fixed the link to the previous article

The link should not go to the preprod
Fixed the Twig syntax
Typos on 17
Fixed the link to the previous article

The link should not go to the preprod
Add Day 18 Capifony Article
Merge pull request #59 from mteneur/migrate_to_sf2_3

Fix Formating article 16
Merge pull request #60 from T1l3/patch-2

fix broken link