Fixed isCluster() hopefully
Merge branch 'master' of https://github.com/m0neysha/Choco-Chip-Cookies

This reverts commit 2d0936a9e9374fdb2c28876b9086f8cb168c8229, reversing
changes made to cad96cca1bcd9bcb7db1a65d7ee60d1c122b2f59.

Conflicts:
	DList.class
	DList.java
	DListIterator.java
	DListNode.java
	GameBoard.class
	GameBoard.java
	InvalidNodeException.java
	List.java
	ListNode.java
	list/DList.java
	list/DListNode.java
	list/InvalidNodeException.class
	list/InvalidNodeException.java
	list/List.class
	list/List.java
	list/ListNode.class
	list/ListNode.java
	player/MachinePlayer.class
	player/MachinePlayer.java
	player/list/DList.java
	player/list/DListNode.java
	player/list/InvalidNodeException.java
	player/list/List.java
	player/list/ListNode.java