Small changes regarding StarredAt.

Making StarredAt more "precise", setting it to the time the change was detected.
getStarred.view now returns albums ordered by StarredAt.
loadRange method now take QueryOptions.Desc into account

persistence/ledis_repository.go

@@ -290,7 +290,13 @@ func (r *ledisRepository) loadRange(idxName string, min interface{}, max interfa
 	maxS := toScore(max)
 
 	idxKey := fmt.Sprintf("%s:idx:%s", r.table, idxName)
-	resp, err := Db().ZRangeByScore([]byte(idxKey), minS, maxS, o.Offset, o.Size)
+	var resp []ledis.ScorePair
+	var err error
+	if o.Desc {
+		resp, err = Db().ZRevRangeByScore([]byte(idxKey), minS, maxS, o.Offset, o.Size)
+	} else {
+		resp, err = Db().ZRangeByScore([]byte(idxKey), minS, maxS, o.Offset, o.Size)
+	}
 	if err != nil {
 		return err
 	}