Merge pull request chebee7i#6 from rainwoodman/master

python notebook support via from nxpd import ipythonsupport

nxpd/ipythonsupport.py

@@ -0,0 +1,12 @@
+from nxpd.nx_pydot import to_pydot
+def install_repr_png():
+    import networkx as nx
+    import StringIO 
+    def getsvg(graph):
+        G2 = to_pydot(graph)
+        buf = StringIO.StringIO()
+        G2.write(buf, prog='dot', format='png')
+        return buf.getvalue()
+    nx.Graph._repr_png_ = getsvg
+
+install_repr_png()