2017-09-19: Added tag v0.9.4 for changeset b536803e2a7c stable

Added tag v0.9.4 for changeset b536803e2a7c

diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -36,3 +36,4 @@ cb0b13b613cbd3c39f5384ea85a570fee2bb3569
 2614197d8be8d9c7cdc00b4ce225f74524b66716 v0.9.1
 40595e956e7d267625accf9d5584bae88466b41a v0.9.2
 7a6f1a55af314540efb68e109b9d15ccdfddeb96 v0.9.3
+b536803e2a7ce03e08088861e4f663dfcb2a01ea v0.9.4