* Moving to PyTorch facilitates the use of the torchdiffeq ODE solvers.
* Changed from a research-only license to MIT
* Introduced several new examples
* Moved the time-points vector into the core dataset class, so that different data-files may have different time-points.
* The start of a more general mechanism for loading data of different raw formats.
* A mechanism for chaining inference problems (passing the approximate posterior of one inference problem as priors of a subsequent inference problem).