Refactors the indexing and the syntax

Human queries are now in french. Sorry for that

data_test.go

@@ -75,7 +75,7 @@ func GetCsvData() *bytes.Buffer {
 
 		m := rxSatID.FindStringSubmatch(a.SatID)
 		if m == nil {
-			panic(fmt.Sprintf("should not happen with %#v", a))
+			panic(fmt.Sprintf("Could not read regexp %#v", a))
 		}
 		fmt.Fprintf(res, ";%d;%s;;;%s;;;;%s;%s;;;\"foo\";;;ALBUM\n", a.State, a.PurchaseDate.Format("02/01/2006"), "", m[1], m[2])
 	}