Include Lowest and Highest when Binning

[jeff-hernandez]

In the bin transform, there should be parameters to include the lowest and/or highest values when binning. This can be done by adding either infinite or min/max values of the target as endpoints in the bins. An example in the docstrings should show how to use this new parameter.

[jeff-hernandez]

The include lowest in pandas cut will set whether the first interval should be left-inclusive or not. This is different from what we want to do.