[Feature] Alias Support (#151)

Fixes #149

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#151

tests/test_multigen_eval.py

@@ -74,6 +74,7 @@ class MultiGenTest(TestCase):
 
             shallow_pathway = graph_from_pathway(SPathway.from_pathway(pathway))
             pathway = graph_from_pathway(pathway)
+
             if not graphs_equal(shallow_pathway, pathway):
                 print("\n\nS", shallow_pathway.adj)
                 print("\n\nPW", pathway.adj)