Update CHANGELOG.MD

Author: raghushantha

CHANGELOG.MD

@@ -1,3 +1,20 @@
+## Released v1.5.0 (March.30, 2016)
+
+####Engine:
+- Fixed engine bug that prevented versioned script rule modules from being loaded
+- Fixed loading issues with custom rules that do not have comment help to describe the rule
+- Housekeeping: Fixes to Appveyor config to use VS 2015 and WMF 5.0 RTM image
+- Community Fix: Updates the Initialize API to process the Profile (Settings) parameter
+- Perf: Improve rule filtering based on severity before invoking the engine to create tasks (threads)
+- Fixed a hang issue that appeared when using ScriptAnalyzer engine recursively with a large data set
+
+####Rules:
+- Various fixes to UseToExportFieldsInManifest rule that include perf and functional fixes
+- Fixes to AvoidNullOrEmptyHelpMessageAttribute to use parsed values instead of ast extent
+- Updated messages for AvoidUsernameAndPasswordParams rule and UsePSCredentialType rule
+- Scrubbed inconsistencies in severities for rules
+- Community Fix: False positive on 'PSUseApprovedVerbs' when scope is declared as a prefix to the Verb-Noun combination
+
 ## Released v1.4.0 (Feb.16, 2016)
 ###Features:
 - IncludeRule and ExcludeRule now consume RuleInfo objects