moving changelog to separate file

Author: AWS Scripting Guy

CHANGELOG.md

@@ -0,0 +1,18 @@
+Changelog
+-------------------
+0.0.11
+* yaml - added test support 
+* merged new snippets (Codepipeline, Codecommit, LaunchTemplate)
+* corrected Tags property
+
+0.0.10
+* start snippet correction
+* lambda support
+* function IF
+
+0.0.8
+* corrected issue with missing language mode UI
+* added latest .vsix to GitHub repo for manual install
+
+0.0.6
+* added support for .cform and .template file extensions