Update "Clean and Prepare Data with Python" to fix deprecated content. #152
Description
There have been some changes to some of the packages used in the tutorial, and because of it, some of the material is either deprecated or will change very soon.
I am submitting a PR with the necessary changes - mainly changes to kwargs in specific methods, and removal of some graphics (seaborn's distplot was deprecated in 0.12, for instance; other positional arguments are no longer accepted as positional, having to be passed as kwargs)