[Backend] Export comptable

ShopBundle/Services/CsvGenerator.php

                 $this->titleDocument = 'csv_file';
                 $this->convertEncoding = false ;
                 $this->fromEncoding = 'UTF-8' ;
-                $this->toEncoding = 'ISO-8859-1' ;
+                $this->toEncoding = 'UTF-8' ;
                 $this->delimiter = ';' ;
         }