Creating a game now adds the game JTree.
Merge branch 'dev' of https://github.com/cs3733bdt/wpi-suite into dev

# By Jeffrey Signore
# Via Jeffrey Signore
* 'dev' of https://github.com/cs3733bdt/wpi-suite:
  Changed the Game model to include List of Requirements, and made add requirement button add the requirement to the current game. Jeffrey Signore, TomPaolillo, Jordan Wetzel
  Minor change to the constructor of AddRequirementsPanel. Jeffrey Signore