Adds readme

Author: craigsdennis

README.md

@@ -0,0 +1,6 @@
+# Cleaning and Preparing Data
+
+These Jupyter Notebooks and datasets are used in the Treehouse course [Cleaning and Preparing Data](https://teamtreehouse.com/library/cleaning-and-preparing-data) by [Alyssa Batula](https://github.com/abatula)
+
+## How to use
+There are folders labelled "s**X**v**Y**" where **x** is the Stage number, and **v** is the video number.