Update changelog for v1.6.0 release

Author: Kapil Borle

CHANGELOG.MD

@@ -1,14 +1,39 @@
+## Release v1.6.0
+
+### Engine
+- Add `SuggestedCorrections` property to `DiagnosticRecord`
+    - This property emits text that can rectify the violation which triggered the rule.
+    - The primary purpose of this feature is to enable quick-fix scenarios in editors (e.g. vscode)     
+- Add "Name" as a positional parameter in Get-ScriptAnalyzerRule
+- Add a `SaveDSCResourceDependency` switch to allow `Invoke-ScriptAnalyzer` to download a DSC Resource module from PSGallery in the event of a `ModuleNotFoundDuringParse` parse error.
+- Add `remove` verb to `UseShouldProcessForStateChangingFunctions` rule
+- Add a `ScriptPath` property to Diagnostic Record that returns the full path of the script
+- Fix the parsing of settings parameter when a hashtable is given
+- Fix writing error record while running rule suppression
+ 
+### Rules
+- Add suggested corrections feature to the following rules.
+    - `PSAvoidUsingCmdletAliases`
+    - `PSAvoidUsingPlainTextForPassword`
+    - `PSMisleadingBacktick`
+    - `PSUseToExportFieldsInManifest`
+    - `PSMissingModuleManifestField`
+- Fix extent of 
+    - `UseSingularNoun`
+    - `UseApprovedVerb`
+    - `AvoidUsernameAndPasswordParams`
+
 ## Release v1.5.0 (Mar. 30, 2016)
 
-#### Engine
+### Engine
 - Fixed an engine bug that prevented versioned script rule modules from being loaded
 - Fixed loading issues with custom rules that do not have comment-based help to describe the rule
 - Fixed a hang issue that appeared when using ScriptAnalyzer engine recursively with a large data set
 - Housekeeping: Fixed Appveyor config to use VS 2015 and WMF 5.0 RTM image
 - Community Fix: Updated the Initialize API to process the `-Settings` (formerly `-Profile`) parameter
 - Perf: Improved rule filtering based on severity before invoking the engine to create tasks (threads)
 
-#### Rules
+### Rules
 - Fixed `UseToExportFieldsInManifest` rule to improve perf and functionality
 - Fixed `AvoidNullOrEmptyHelpMessageAttribute` to use parsed values instead of ast extent
 - Fixed inconsistencies in severities of rules