API and build change and fix summaries. Doc correctsions
and/or changes are not mentioned here; see the commit messages.
+2020 March 5; Version 3.3.1
+ Correct several "bugs" identified by automatic code analysis.
+
+2020 March 4; Version 3.3.0
+ Add SI95 based unit testing
+ Health check support binary added (reason for minor bump)
+
2020 February 29; Version 2.4.0
Add consolidated testing under CMake
Add support binary for health check (SI95 only)