6tronl/artus: Full documentation added

Artus is a python package to automatically produce maps thanks to deep learning models. With artus, you can train deep learning learning models (neural network) on raster images annotated with vector files. You can then use the  trained model to predict spatial occurrences on new unlabeled rasters. Predictions can be exported to a GeoJson format and uploaded in your favourite GIS software.

In this release a full documentation was added on Read the docs.