v0.8.1

• Fixed error with updating u with MCNR/MCEM
• Improved method of tracking log-likelihood values between iterations
• Several bug fixes for Model R class including: accessing gradient and MCMC samples
• Added a range of S3 methods for mcml, mcml.summary, and Model classes, including summary, coef, print, log.lik, and so forth.
• Fixed error with printing not ending in a new line
• Added Hessian correction for non-linear models
• Improved formula parsing
• Added "twoway" functions as a specifiable function
• Reduced memory overhead of model class by removing calc objects from model, which were seldom used.
• NOTE: OpenMP has been disabled for this release: there was an error in one of the parallelised loops causing nonsense results. The error has not been identified and so all parallelisation within this package is disabled until it is resolved.
• Some optimisations for the calculator class to improve calculation speed
• Fixed some formulae errors for some gradient functions, and improved functionality to better support newton-raphson methods.
• Set default Eigen index to int to remove warnings about converting types.
• Fixed issue with HSGP where log-likelihoods did not update.