Update CHANGES and clean up the explore_ast example
diff --git a/CHANGES b/CHANGES
index fb11144..304eab5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,7 +2,8 @@
 
   - PR #161: Update bundled PLY version to 3.9
   - PR #158: Add support for the __int128 type.
-  - PR $169: Handle more tricky TYPEID in declarators.
+  - PR #169: Handle more tricky TYPEID in declarators.
+  - PR #178: Add columns to the coord of each node
 
 + Version 2.17 (29.10.2016)