Multivariate scenario

[bradstallion]

Hi Emanuel, thanks for your code.

This branch extends it to multivariate series, where features are (slot, signal). It should be compatible with your scenario (univariate). Moreover, it includes:

• updated requirements
• setup.py includes requirements.txt
• some logging
• the test demo/testmultivariate.py (requires sktime)

I hope you'll find this changes useful... and correct! :-)

Please feel free to test and pull it, if you want. Thanks Bye