links in backup-4.1.9

- old
+ new

@@ -1,3 +1,3 @@
-Project Home:  https://github.com/meskyanichi/backup
-Documentation: http://meskyanichi.github.io/backup
-Issue Tracker: https://github.com/meskyanichi/backup/issues
+Project Home:  https://github.com/backup/backup
+Documentation: http://backup.github.io/backup
+Issue Tracker: https://github.com/backup/backup/issues