[IDEA] Introduction about AutoML

- AutoML provides tools to automatically discover good machine learning model pipelines for a dataset with very little user intervention.
- It is ideal for domain experts new to machine learning or machine learning practitioners looking to get good results quickly for a predictive modeling task.

Since this book serves as a bible for many ML practitioners, I felt it is necessary to include AutoML in one of the chapters. Since this book gives machine learning implementations with Scikit-learn it can easily extend to introduce Scikit-learn related AutoML libraries like Hyperopt-Sklearn, Auto-Sklearn, and TPOT. I am sure it will be definitely valuable for learners.

I love reading this book its just a small suggestion from me :)