Changes in version 0.6.1 (2023-12-11)                  

2023-12-31: Replaces ecd with gnorm. Removes Oxford-Man related
functions.

                 Changes in version 0.5.1 (2019-12-05)                  

2019-12-05: Bug fix release. Uses is(a,b) instead of class(a)==b.

                 Changes in version 0.4.5 (2018-02-28)                  

2018-02-28: Bug fix release. The format for Oxford-Man volatility file
has changed.

                        Changes in version 0.1.1                        

2017-04-13: The first public release. MLE optimizer is implemented
according to Zucchini's book on HMM.