Functions and datasets from Hilbe, J.M., and Robinson, A.P. 2013. Methods of Statistical Model Estimation. Chapman & Hall / CRC.
o Fixed registration of S3 methods.
o Added new function 'nbinomial' to fit negative binomial regression with some extra reporting, eg Pearson residuals.
o Extended summary.msme to optionally report Pearson residuals.
o Added new references to help files and rejigged data examples to use msme functions.
o Now exporting asymptotic likelihood ratio test function, alrt.