Update changelog

CHANGELOG.md

@@ -11,6 +11,8 @@ Core Features:
 * ability to use variables from {{ }} syntax in mainline playbooks, new 'when' conditional,
   see examples/playbooks/upgraded_vars.yml
 * can set ansible_private_key_file as an inventory variable (similar to ansible_ssh_host, etc)
+* 'when' statement can be affixed to task includes to auto-affix the conditional to each task therein
+* cosmetic: "*****" banners in ansible-playbook output are now constant width
 
 Modules added