Add data cleaning, aggregation, and feature engineering final project tasks to lessons 5 and 6

[toma63]

Introduce the data cleaning, aggregation and feature engineering tasks in the week 5 assignment and follow up in the week 6 assignment. These will be based on a Kaggle notebook, similar to the v1 Kaggle capstone. This will involve selecting a dataset and analysis goals from among the curated ones which are recommended, and then performing the cleanup and data wrangling portions of the project.