title: Error in py2app
body: <p>I am testing py2app on a simple test.py application, doing nothing special.</p>
  
  <pre><code>python == 3.6
  py2app == 0.14
  </code></pre>
  
  <p>It builds fine with no errors when I give this command:</p>
  
  <pre><code>python3.6 setup.py py2app -A
  </code></pre>
  
  <p>but when I launch it, this is the result:</p>
  
  <pre><code>./dist/test.app/Contents/MacOS/test 
  
  Traceback (most recent call last):
    File "/Users/fabio/projvenv/dist/test.app/Contents/Resources/__boot__.py", line 132, in &lt;module&gt;
      _run()
    File "/Users/fabio/projvenv/dist/test.app/Contents/Resources/__boot__.py", line 126, in _run
      exec(compile(source, script, 'exec'), globals(), globals())
    File "/Users/fabio/projvenv/test.py", line 3, in &lt;module&gt;
      import tkinter
    File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/tkinter/__init__.py", line 36, in &lt;module&gt;
      import _tkinter # If this fails your Python may not be configured for Tk
  ValueError: character U+6573552f is not in range [U+0000; U+10ffff]
  2017-06-24 11:32:26.266 test[65341:8804502] test Error
  </code></pre>