README revision

[NeedToLookAtMyPictures]

I've heard anecdotally that many people have been unable to run this project. I think this stems from the "Installation" subsection's command in the README. Instead of run using python monopoly.py it should say:

run using "python -m monopoly_directory.monopoly" from TERMINALMONOPOLY (root folder)

[NeedToLookAtMyPictures]

When trying to run monopoly.py alone the file cannot properly fetch its dependencies within monopoly_directory.

Traceback (most recent call last):
  File "C:\Users\bmmah\OneDrive\Documents\GitHub\TERMINALMONOPOLY\monopoly_directory\monopoly.py", line 5, in <module>
    from monopoly_directory.properties import Property
ModuleNotFoundError: No module named 'monopoly_directory'

This workflow avoids that bug.