Wrapper functions for fastcpd to find change points in various models.
fastcpd.mean(), fastcpd.variance(), fastcpd.mv(),
fastcpd.meanvariance() for basic statistics change models;
fastcpd.lm(), fastcpd.binomial(), fastcpd.poisson(),
fastcpd.lasso() for regression coefficients change models;
fastcpd.ar(), fastcpd.var(), fastcpd.arima(), fastcpd.arma(),
fastcpd.garch() for change in time series models.