Add RangeScaler and RangeUnscaler primitives

Add a `RangeScaler` primitive that allows scaling data to a specified min-max range, like scikit-learn MinMaxScaler, but which also comes with an inverse primitive `RangeUnscaler` which allows reverting back the transformation to the original state.

Implementation should be similar to the existing `ClassEncoder` and `ClassDecoder` couple of primitives.