Retour à require plutôt que import dans les sass

app/assets/stylesheets/application.css.sass

@@ -12,22 +12,10 @@
  *
  *= require select2
  *= require leaflet
+ *= require_tree .
  */
 
-@import all
-@import awesome_mixins
-@import events
-@import list
-@import lugs
-@import maps
-@import mobile
-@import moderations
-@import notes
-@import region
-@import scaffolds
-@import sessions
-@import tags
-@import users
+@import 'awesome_mixins'
 
 body.application
   &.infos h4