Unable to replicate some of the Experiments using HillTau model

[nishaann]

With the new simWrapHillTau.py, I am unable to replicate some of the experiments using HillTau model esp. DoseResponse and BarCharts.

One subset that has shown significant differences is the PKC subset.
Schaechter1993_Fig6.json
Schaechter1993_Fig7.json
Schaechter1993_Fig8.json
Schaechter1993_Fig1B_presenceOfCa.json
Schaechter1993_Fig1B_absenceOfCa.json
Andreozzi2003_Fig1A.json