DtD 0.2.2

• Use profile likelihood function with MLE. This is faster and more precise.
• Use the same optimization method as optimize.
• Fixed errors in vignette.

DtD 0.2.1

• Fixed typos and errors in vignette.

DtD 0.2.0

• More stable computations are used in the iterative method. Thus, the results of the methods may have been changed slightly.
• A method have been added to compute the parameters over a rolling window.
• A method have been added to compute the log-likelihood.