[DEV] open new 1.4 development branch

This new branch is based on 1.3.18, which 1.4-dev0 is 100% equivalent to.
diff --git a/CHANGELOG b/CHANGELOG
index 1ce97c4..36447d2 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,9 @@
 ChangeLog :
 ===========
 
+2009/06/09 : 1.4-dev0
+    - exact copy of 1.3.18
+
 2009/05/10 : 1.3.18
     - [MEDIUM] add support for "balance hdr(name)"
     - [CLEANUP] give a little bit more information in error message