Merge pull request #7595 from yzluka/README_edit

Updated the start date for the "abbrviated list of release note" section in the README file

Author: jjhursey

README

@@ -118,7 +118,7 @@ The rest of this README file contains:
 ===========================================================================
 
 The following abbreviated list of release notes applies to this code
-base as of this writing (March 2017):
+base as of this writing (April 2020):
 
 General notes
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