v3.1.28 in production, from V3.1.26

Likely left this in beta too long but all seems well and no comments from the crowd.

VERSION = "3.1.28"
"""
3.1.28
DONE fix Controller/Temp ready_event poll gating (.is_set)
DONE temp reset_stats clears prevVal; CtoF/FtoC mutual exclusion on GV13
DONE VirtualTempC commands match nodedef (no setCtoF)
DONE QUERY in nodedef for switch/delay/toggle/generic/temp nodes
DONE onDelay reports TIMER; generic SETST send/report naming
DONE NLS typo CMD-ctl-QUERY-NAME; onOnly docstring

3.1.27
DONE virtualgeneric: DON optional level param (IoX dimmer convention, fixes #11)
DONE virtualgeneric: ONLEVELTYPE UOM 25 + SETOLT command (fixes #12)
DONE virtualgeneric: SETOL zero onlevel uses DIMLOWERLIMIT (else fix)