First Commit
Redesign Hierarchy
Create README.md
Update README.md
Update README.md
Undirected Graph Update
SimpleGraph TestCase Added
Revert "SimpleGraph TestCase Added"

This reverts commit ee43c8fe9655e1dcdd8bcb2fac67a63ca0e47549.
Revert "Revert "SimpleGraph TestCase Added""

This reverts commit 817df9257f311308f51c2cf46ea0fd90fe69db18.
BFS and DFS Implemented
Implemented MultiGraph and edited addEdge()
Changed Queue and Stack to LinkedList
Implemented Directed Graph
Edited minor format
Moved stack and queue to abstract iterator
Moved addEdge() to abstract class
Added and edited test cases
Added toString() to directed graph and other minor changes
Changed wrong committer email