Add advanced section

Author: DivineOmega

README.md

@@ -160,4 +160,14 @@ The `predict` method should be passed the attribute name you wish to predict.
 It will then returns the prediction as a string or numeric type. 
 
 In our example, this should be the 'setosa'
-species, based on [Iris flower data set](https://en.wikipedia.org/wiki/Iris_flower_data_set).
+species, based on [Iris flower data set](https://en.wikipedia.org/wiki/Iris_flower_data_set).
+
+## Advanced
+
+### Prediction probabilities
+
+TODO
+
+### Changing machine learning model(s)
+
+TODO