fix start_python_console() to work with IPython >= 0.11. closes scrapy#335

Author: pablohoffman

scrapy/utils/console.py

@@ -11,7 +11,10 @@ def start_python_console(namespace=None, noipython=False):
             if noipython:
                 raise ImportError
             import IPython
-            shell = IPython.Shell.IPShellEmbed(argv=[], user_ns=namespace)
+            try:
+                shell = IPython.embed(user_ns=namespace)
+            except AttributeError:
+                shell = IPython.Shell.IPShellEmbed(argv=[], user_ns=namespace)
             shell()
         except ImportError:
             import code