Made changes to integrate Player class into prototype. The program
now has an array in the Environment class for active players.
Unfortunately, the program still hard codes only two player rather than
allowing for a selectable range of players or the ability to have the
program expand to this in the future (still tied to the player1 == left
and player2 == right model of the prototype).
The prototype still runs as before without fault.

 On branch transitory
  Changes to be committed:
	modified:   TankWars/src/com/amphibian/environment/Environment.java
	new file:   TankWars/src/com/amphibian/player/HumanPlayer.java
	deleted:    TankWars/src/com/amphibian/player/Human_Player.java
	modified:   TankWars/src/com/amphibian/player/Player.java
	modified:   TankWars/src/com/amphibian/tank/Tank.java
	modified:   TankWars/src/com/example/tankwars/TankWars.java