Update Player.cs

Adds a number of variables to keep track of the different players and connect it to the User Interface.
Update UserInterface.cs

added the capability to draw and keep track of 4 different player counters, as well as linking it up with the player class.
Update Character.cs

No changes to the actual code - just cleaned up the white space a bit.
Update Game1.cs

Updated with the changes for the new interface and player class. Hopefully everything still works.
Merge pull request #2 from crimsonKangaroo/master

User Interface Changes