Add visibility declarations where they remain missing
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 34d6a0b..47220d6 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -36,6 +36,7 @@
    -  Removed previously deprecated use of ``$autoload['core']`` in application/config/autoload.php.
       Only entries in ``$autoload['libraries']`` are auto-loaded now.
    -  Added some more doctypes.
+   -  Updated all classes to be written in PHP 5 style, with visibility declarations and no ``var`` usage for properties.
 
 -  Helpers