Create a main.jl file for users to change model options and run everything

[FrankErrickson]

Outside users should have one single file where they can change various model specifications (e.g. prior distributions, timespan for model projections, etc.) to then run everything and get the results. One question is whether there should be two files, (i) one for the model calibration and (ii) one for the model projections. The alternative would be a single main.jl file that runs everything.

Some of the model specifications that could be modified in these master files includes:

• Which likelihood function to use (standard or Vivek's updated version)
• The number of samples for the MCMC calibration
• The prior distributions to use
• Which calibration data sets should be used
• Burn-in length for MCMC calibration
• The timespan to run/calibrate the model