updated log for current 0.5.2 changes

Author: chrissimpkins

CHANGELOG.md

@@ -1,5 +1,11 @@
 ## Changelog
 
+### v0.5.2
+
+- percent command: now forces entry of a percent integer value > 0, reports error & exits with attempts to enter values <= 0
+- percent command: added standard output warning if there is an attempt to modify to a percent value > 100%
+- minor standard output user message updates
+
 ### v0.5.1
 
 - fixed implicit string cast / concatenation bug with Python 3.x interpreters