yatsm: Yet Another Time Series Model (YATSM): v0.4.1

CCDC style model now includes a "slope test" for stability of training period (see #22).

Enable the "slope test" by adding the following to your model configuration file:

A True boolean value will enable the "slope test" as shown in Zhu and Woodcock, 2014. Specifying a float value instead will enable the "slope test" but use the specified float value as the test threshold instead of the default value specified by threshold.