Merge pull request #64 from ellisonleao/master

adding ipb python snippet

Author: Shougo

neosnippets/python.snip

@@ -134,3 +134,7 @@ options     word
 snippet     pdb
 abbr        import pdb..
     import pdb; pdb.set_trace()
+
+snippet     ipdb
+abbr        import ipdb..
+    import ipdb; ipdb.set_trace()