ErbB type 2:3 6 binding sites to PI3K, WARNING: Hack
Added Chen Sorger 6 PIP2 PI3K binding sites
Added initial values from Chen Sorger 2009 Jacobian files, added coated pit protein interactions to model, and changed model to start with some initial Grb2-SOS complex (to match Chen-Sorger model).
Added parameter dictionaries for A431, H1666, and H3255 cell types.  Dictionaries currently contain initial values, rate constants for receptor-level events, and rate constants for MAPK events, all from Chen-Sorger Jacobian files.
Added AKT pathway rates to parameter dictionary and modified some AKT model topography to match Chen/Sorger model.
Final (hopefully) version of Chen-Sorger model; parameters=0 in dictionary set to 1e-15 to avoid division by zero errors during calibration; ODEs=530
Calibration script and experimental data for A431 cells with high EGF
Added experimental data arrays for all experiments
Calibration script used for initial calibration (added saving of parameter distributions and fitted parameters as numpy arrays).
separate calibration files for different conditions
Added calibration file for combined experimental data for A431 cells
Added initial value arrays for different experimental conditions (A431 cells)
Modified combined experimental A431 calibration file integration settings