v1.12.12.3

-- Added user functions for calculating standard deviation at the group and subjects level.
-- Added the new user function to default processing stream config file generation and to unit test.
-- Fixed problem in ProcStreamEditGUI adding functions incorrectly because of unclear which registry copy is being used. Deleted the confusing funcReg field in procSteamEdit varianble and instead using the dataTree.reg copy for all accesses to the registry from ProcStreamEditGUI.
-- Fix small matlab error in ProcResultClass resulting from not checking for empty DataClass variable.
-- Fix incorrect help comments in hmrG_SubjAvg.m and hmrS_RunAvg.m.
-- Fix PlotProbeGUI not setting fonts in the GUI correctly when starting.