Add Smith_BMCSystBiol2013

[FFroehlich]

Publication details:
Title: Computational modelling of the regulation of Insulin signalling by oxidative stress

Reference:
https://doi.org/10.1186/1752-0509-7-41

Code and model availability:
SBML: https://github.com/graham1034/Smith2012_insulin_signalling/tree/master/m8b2_complete_model

Experimental data:
tsv files in figure directories: https://github.com/graham1034/Smith2012_insulin_signalling