API and build change and fix summaries. Doc correctsions
and/or changes are not mentioned here; see the commit messages.
+2020 February 29; Version 2.4.0
+ Add consolidated testing under CMake
+ Add support binary for health check (SI95 only)
+
+2020 February 28; Version 2.3.6
+ Fix bug in Rt. Mgr comm which prevented table ID from being
+ sent on ack message (RIC-232).
+
2020 February 26; version 3.2.5
Fix source address bug in SI95 receive/send funcitons.
Fix threading issues involving session disconnection in SI95