docs/wrspice_release_notes

wrs3.2 120968Mon Jan 19 5:24:29 UTC 2015
wrs4.1 71094Thu Oct 1 3:38:09 UTC 2015
wrs4.2 48681Wed Mar 29 5:15:05 UTC 2017
wrs4.3 51994Wed Jan 27 17:48:14 UTC 2021