Explain augment dataset

[zegermouw]

Augment dataset has flag explain.

1. Autofeat computes relationships between n number of tables in the {dataset} repository using {coma, jaccard} similarity with a threshold of x.
2. Autofeat computes n join_trees.

[AndraIonescu]

The explain text should be the following:

1. AutoFeat computes the relationships between N tables from the {dataset} repository, using {coma, jaccard} similarity score with a threshold of X (i.e., all the relationships with a similarity < threshold will be discarded).
2. AutoFeat creates M join trees: the best performing join tree is {ID_number}
   • < print paths with the data quality score >
   • < print the selected features with the relevance and redundancy score >
   • < print ML result: accuracy, model, feature importance >