BPM coefficients don't align with explanatory variables in BPM model - bas and pred.bas objects

[merliseclyde]

In Section 8.4 the coefficients that are extracted from the coefficients object do not have zeros where expected for the Best predictive model due to an issue that the reference to the best model refers to the location of the best model in the original bas object but the order to the output from coef.bas is sorted based on model probabilities. Updated the chapter with the correct code so that the coefficients correspond to the correct model. See Issue merliseclyde/BAS#49

[merliseclyde]

Updated book and republished