tagging for release 2.5a0
diff --git a/.hgtags b/.hgtags
index 1572143..2917d8b 100644
--- a/.hgtags
+++ b/.hgtags
@@ -54,3 +54,4 @@
 9aed528daf61c323e10448ebd44ba70b92579023 v2.4
 3dabd9bb496e9a68cd6cd94b7622973fc766405a v2.5a0
 0000000000000000000000000000000000000000 v2.5a0
+a4d2f7b847b1e8289582fc24484b73de589fed5e v2.5a0