Adding in a LinkedList class called "LinkedLst".
Including EuclideanGCD algorithm.  also.... Minor changed to LinkedLst and fixed the print(Node head) function in Utils.
Added a Tree (BST) data structure and a Graph data structure.  They both include Depth First Search (DFS) and Breadth First Search (BFS).
Cleaning up.
Changing a filename.
Added my own implementation of a HashTable.  It uses LinkedLists as it's buckets.
Moved list size check to top of sort function for MergeSort.