spyder not working w/ WinPython-64bit-3.6.3.0Qt5

hi,

the subject is not quite right, after a nasty tweak i got it working (somewhat), please bear with me.

note my system is Win7-64 and i want to use the latest python 3.6 and spyder/qt5. i know what you have said elsewhere about this combination ... however, all WinPython3/qt distros of the last 1.5 years have worked for me without problems, incl WinPython-64bit-3.6.2.0Qt5. mind you: i have never registered WinPython with the OS and i usually (have to) delete the previous .[enter-settings-dir-here]. (there are sometimes quirks with the firewall that need to be sorted out though.)

now i tried to migrate to WinPython-64bit-3.6.3.0Qt5, but spyder just won't start. this is the traceback from the error log (cf issue #579):

```
Traceback (most recent call last):
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\app\mainwindow.py", line 3099, in main
    mainwindow = run_spyder(app, options, args)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\app\mainwindow.py", line 3001, in run_spyder
    main.setup()
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\app\mainwindow.py", line 1171, in setup
    self.setup_layout(default=False)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\app\mainwindow.py", line 1437, in setup_layout
    self.setup_default_layouts('default', settings)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\app\mainwindow.py", line 1614, in setup_default_layouts
    widget.toggle_view(True)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\plugins\ipythonconsole.py", line 713, in toggle_view
    self.create_new_client(give_focus=False)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\plugins\ipythonconsole.py", line 1009, in create_new_client
    self.connect_client_to_kernel(client)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\plugins\ipythonconsole.py", line 1035, in connect_client_to_kernel
    stderr_file)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\spyder\plugins\ipythonconsole.py", line 1440, in create_kernel_manager_and_kernel_client
    kernel_manager.start_kernel(stderr=stderr)
  File "B:\P\python-3.6.3.amd64\lib\site-packages\jupyter_client\manager.py", line 234, in start_kernel
    "Currently valid addresses are: %s" % local_ips()
RuntimeError: Can only launch a kernel on a local interface. Make sure that the '*_address' attributes are configured properly. Currently valid addresses are: ['130.216.54.47', '0.0.0.0', '']
```

the usual tricks of deleting (all) the .settings dirs and running spyder_reset did not help.

the code eventually failing seems to be jupyter_client\manager.py, line ~234

```
        if self.transport == 'tcp' and not is_local_ip(self.ip):
            raise RuntimeError("Can only launch a kernel on a local interface. "
                               "Make sure that the '*_address' attributes are "
                               "configured properly. "
                               "Currently valid addresses are: %s" % local_ips()
                               )
```

i realize that this test was present in older releases as well, yet, something triggers it to fail in the latest release.

now the remedy: if i comment this test out, spyder starts up normally, my code works, my plots plot - hurray!

obviously, this is not an ideal solution and i hope that you might be able to track down what the root problem is.

finally, while most is running fine after this tweak, i run into one issue which i cannot tell if it is related to my tweak, the root problem, or some unrelated spyder bug: i don't like inline graphics so i set IPython_console/Graphics/Backend to Automatic or Qt5. When doing so, restarting the kernel in an IPython console triggers a runtime error:

```
 Traceback (most recent call last):

  File "<ipython-input-1-64557277dbff>", line 1, in <module>
    get_ipython().run_line_magic('matplotlib', 'qt5')

  File "B:\P\python-3\lib\site-packages\IPython\core\interactiveshell.py", line 2095, in run_line_magic
    result = fn(*args,**kwargs)

  File "<decorator-gen-108>", line 2, in matplotlib

  File "B:\P\python-3\lib\site-packages\IPython\core\magic.py", line 187, in <lambda>
    call = lambda f, *a, **k: f(*a, **k)

  File "B:\P\python-3\lib\site-packages\IPython\core\magics\pylab.py", line 99, in matplotlib
    gui, backend = self.shell.enable_matplotlib(args.gui)

  File "B:\P\python-3\lib\site-packages\IPython\core\interactiveshell.py", line 2983, in enable_matplotlib
    self.enable_gui(gui)

  File "B:\P\python-3\lib\site-packages\ipykernel\zmqshell.py", line 482, in enable_gui
    real_enable_gui(gui)

  File "B:\P\python-3\lib\site-packages\ipykernel\eventloops.py", line 308, in enable_gui
    raise RuntimeError("Cannot activate multiple GUI eventloops")

RuntimeError: Cannot activate multiple GUI eventloops
```

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spyder not working w/ WinPython-64bit-3.6.3.0Qt5 #582

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spyder not working w/ WinPython-64bit-3.6.3.0Qt5 #582

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