Lots of minor cleanups and refactorings.

Conflicts:
	src/com/ideopoly/game/BoardCell.java
	src/com/ideopoly/game/CASH_TYPES.java
	src/com/ideopoly/game/Chance.java
	src/com/ideopoly/game/CommunityChest.java
	src/com/ideopoly/game/GameBoard.java
	src/com/ideopoly/game/Player.java
	src/com/ideopoly/tests/ChanceTester.java
	src/com/ideopoly/tests/CommunityChestTester.java
	src/com/ideopoly/tests/PlayerTester.java