Changed scipy, tqdm, statsmodels

An example 'principal_component_analysis' was added to specifically test this functionality. It uses the analytical model.
Fixed two if-calls in `pca_transformation` to match older code and the content of the function.

This merge is to be a part of release 1.1.0.
It contains bug fixes and restructuring of the classes BayesInference and BayesianModelComparison, as well as new tests and examples and the first draft of a package-specific website.

Example 'only-model' created based on the 'analytical-function' to test Inference without a surrogate.
Currently it's not running without building the surrogate - do tests first and see if able to refracture?

Revert "Merge branch 'fix/BMC' into 'master'"

See merge request !19

This reverts merge request !18

Basic tests and cleanup of Inference and Model Comparison

See merge request !18

This reverts commit acf483a1

Split the model comparison to be callable in functions for bayes factors, model weights and justifiability analysis and renamed the overall function

BMC only runs the BME part of BayesInf, split JA into its own function, removed redundant function in MCMC, added to function diagrams

More test for BayesInf, starting tests for MCMC

Some simple fixes for various test, start on testing BayesInf, output directory as changeable parameter in BayesInf

Version 1.0.0

See merge request !17