doc : CHANGELOG updated

Author: sepandhaghighi

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Test system modified
 - `DEBUG` parameter renamed to `debug`
 - All parameters moved to `orangetool_params.py`
+- Some functions moved to `orangetool_utils.py`
 - `ADDRESS` parameter renamed to `address`
 - `Zone` parameter renamed to `zone`
 - `uptime` and `idletime` functions updated