Improve feature_selection module

[VicenteAR]

Implement the following improvement to the feature selection modules:

• Allow to disable model optimization
• Use include models as a parameter instead of exclude
• Add number_of_featues internal flag instead of type checking against int
• Add Parameters for passed arguments to init`.
• Remove ml_bets specific code and only pass a dataset and target parameter
• Document parameters
• name dataframe columns using snake_case conventions