'Parse' Method

[wxiang54]

We require a parsing method to parse user input and filter out driver-related tasks from generic commands. We can either implement this method in Game.java, Util.java, or Risk.java.

All 3 have drawbacks:

• Having it in Game.java doesn't really make logical sense as a game (like a board) shouldn't be parsing input
• Having it in Util.java requires map access for certain commands, but we wanted Util.java for very generic tasks, without needing something like a map beforehand
• Having it in Risk.java makes the most logical sense to us, but Risk.java is a driver file and we're not sure if it's ok to define a method in a driver file, let alone make the game a private var

We're defining the parse method in Game.java for convenience, but open to change.

[wxiang54]

Game.java is obvious winner, being the most convenient and with little time to make major structural changes.