Revert "debut essence"

This reverts commit 553aeb1f86fba6ee54e5ad0050571a5bd2fc0098.
Revert "Revert "debut essence""

This reverts commit e8b484c2f94ec439f09fb77f7aa57ca4ee87ebce.
Modif mineur
Merge remote-tracking branch 'origin/master'