Update inc/libreg.h to remove v_rst_vars
Update inc/libreg/err.h to remove return value for regErrCheckLimits()
Update inc/libreg/rst.h to add track_delay variables and regRstAverageVref()
Update libreg err.h/c to re-add enable_err control parameter to regErrCheckLimits()
Update src/rst.c to add regRstAverageVref() and track_delay measurement to regRstHistory()
Update src/reg.c to use new delay and noise/tone functions in regSimulate()