Craig Fordahl

 - different folders (for individual users)
 - x- and y-scaling of Poincare diagram should be the same
 - cloud based storage

 - new (user-defined) metrics
   sdnn/avg_hrate
   rmssd/avg_hrate

   "normalized HRV Metrics"

    rmssd/rhr  (Percent)

    rhr  resting heartrate  in msec   rhr = 60000/HRR 

    normalized RMSSD

    nRMSSD =   100 x (RMSSED x HRR)/60000  Percent



sn

 - in general  metric/avg_hrate

 - even more general user-defined metrics defined by a formula
   using the basic metrics