Changes for version 0.007 - 2021-01-16
- [bugfix] Use zscore tables as well as percentile tables to produce zscore results, we cannot convert from percentile to zscore using Statistics::Standard_Normal other than for the height-age data, because the other data do not follow a normal distribution.
- [incompatible changes] Rename some result keys.
Lookup height/weight in the WHO growth chart (a.k.a. growth reference, growth standards)