Pcntoolkit

- Major code refactoring
- Requirements updated for python 3.8.3
- Updates to documentation and Integrations with Read the Docs
- Addition of tutorial material
- Performance improvements for BLR (not compatible with previous versions)
- Addition of heteroskedastic noise for BLR
- Addition of Bayesian Information Criterion for BLR
- Addition of utility functions (e.g. design matrix construction)
- Several minor bug fixes (mostly related to HBR and BLR)

- separate standardization of responses and covariates
- standardization is no longer on by default
- new standardization methods
- pymc3 version fixed
- minor bugs resolved (CV with HBR)

- addition of cross-validation functionality for HBR
- minor bug fixes for HBR

- New syntax for functions related to parallelization (python path is automatically generated)
- Support for slurm clusters has been added
- Updates to hierarchical Bayesian regression (different priors for intercepts and noise) for improved transfer
- Updated parameterisation for likelihood warping for improved stability
- Now uses a fixed pickle protocol for better interoperability
- Addition of a utility function for loading freesurfer measures
- Updated sphinx documentation

Minor bug fix relative to release 0.15. Fixed a transpose operation that would cause normative.py to fail in certain cases

A number of new functions have been implemented and we decided to use a new version numbering system to improve consistency.