API and build change and fix summaries. Doc correctsions
and/or changes are not mentioned here; see the commit messages.
+2020 January 16; version 3.0.0
+ Introduce support for SI95 transport library to replace NNG.
+ (RMR library versions will use leading odd numbers to avoid tag collisions
+ with the wrapper tags which will use even numbers.)
+
2019 December 9; version 1.13.1
Correct documentation and missing rel-notes update for RTD.