Add Bias correction option for the forecast

[catarinawor]

Based on the discussion from issue #20, we decided that we should add an option to include the bias correction on the forecast error - This is not a priority now as the forecast is not used in the LRP work.

See original comment from Carrie below.

[catarinawor]

Original input from @carrieholt :

Yes, bias correction was left out of forecast because forecasts for P salmon generally don't include it. However, we are including bias correction in log-normal distributions in population dynamics model, and so, when we start to use the observation error component of the model again down the road, we should also adjust those. Cam, I have a table that we used in the write-up for the recent SBC CK RPA (in press) that documents when/where log-normal bias corrections have been included for salmon assessments and projections that might be helpful (CSAS and primary lit).