added getValueAtIndex method, need to test to see if it will work.
added a return in the else clause to make it work. otherwise will return nothing
changed getValueAtIndex method into getNodeAtIndex method so returns a node instead of the value stores in the node. This way this method can be used by both the get and remove method in LinkedList. Finished remove method which uses getNodeAtIndex method to take the node at index -1 and set its Next value to the node at Index + 1 thus bypassing the Node that is to be removed