Fixed Global_Avg Issue; Cleaned Code; Changed UI

- Fixed Global_Avg Issue: The code was not calculating the global game
averages correctly
- Cleaned Code: Removed commented code and moved local variables to the
top showing the key/value pairings of dictionaries
- UI: You should only ever have to run Steam_Rec. It gives you a command
prompt for running the recommender, populating the data files, etc.