Use NCI formula numbers

[howard-lightfoot]

As used by AZ see Crafter et al. International Journal of Oncology 2015
Report numbers and fit data and report IC50 and Emax.
Normalizes data between -1 and 1, with cytotoxic values <0.

[howard-lightfoot]

Add to spreasdsheet from comboDevR in the first instance.

Fit curves with these values.

Add to summary box on matrix page (IC50, EmaxE)