Add BC breaking notes to changelog.

[skip ci]

Author: noplanman

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/).
 
+Exclamation symbols (:exclamation:) note something of importance e.g. breaking changes. Click them to learn more.
+
 ## [Unreleased]
 ### Added
 ### Changed
@@ -14,7 +16,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - Ability to define custom valid IPs to access webhook.
 - Execute commands via cron, using `cron` action and `g` parameter.
 ### Changed
-- Remodelled the config array to a more flexible structure.
+- [:exclamation:][0.44.0-bc-parameter-structure] Remodelled the parameter array to a more flexible structure.
 - `bot_username` and `secret` are no longer vital parameters.
 ### Fixed
 - Initialise loggers before anything else, to allow logging of all errors.
@@ -74,3 +76,5 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 ## [0.1] - 2016-08-20
 ### Added
 - First minor version that contains the basic functionality.
+
+[0.44.0-bc-parameter-structure]: https://github.com/php-telegram-bot/telegram-bot-manager/wiki/Breaking-backwards-compatibility#parameter-structure-changed "Parameter structure changed"