Changes

The repo will contain a check script, a README file, and the file where you will enter your code.

For the first milestone you will have two functions to complete.

* <code>call_du_sub</code> will take one argument and return a list. The argument is a target directory. The function will use <code>subprocess.Popen</code> to run the command <b>du -d l <target_directory></b>.