Update README.md
Initial empty files
Added Node class
Test for init node
Merge branch 'simple_graph' of github.com:johnshiver/data-structures into simple_graph
Add test for init node
Delete unnecessary file
Test for init node passed; required changes to file
Add test for graph init
Add Graph class, fixed errors in test graph init
Add test for init graph class
Add edge class and fixed test_edge
Add add_node and nodes methods to Graph, write corresponding tests
Add graph init fixture
Add has_node method and corresponding test
Add edges method to Graph with test
Add delete edge method and test
Add functions del_node and adjacent
Add neighbors function
Merge pull request #10 from johnshiver/simple_graph

Simple graph