IndexError in type_enc.pxi

On OS X Yosemite using a PyInstaller packaged app looking like this:

``` python
#!/usr/bin/env python
from plyer import filechooser

print(filechooser.choose_dir())
```

I get:

``` python
Traceback (most recent call last):
File "", line 4, in
File "/usr/local/lib/python2.7/site-packages/plyer/facades/filechooser.py", line 53, in choose_dir
File "/usr/local/lib/python2.7/site-packages/plyer/platforms/macosx/filechooser.py", line 104, in _file_selection_dialog
File "/usr/local/lib/python2.7/site-packages/plyer/platforms/macosx/filechooser.py", line 48, in run
File "pyobjus.pyx", line 439, in pyobjus.ObjcMethod.__call__ (pyobjus/pyobjus.c:31580)
File "pyobjus_conversions.pxi", line 239, in pyobjus.convert_cy_ret_to_py (pyobjus/pyobjus.c:20238)
File "pyobjus_conversions.pxi", line 180, in pyobjus.convert_to_cy_cls_instance (pyobjus/pyobjus.c:19322)
File "pyobjus.pyx", line 669, in pyobjus.autoclass (pyobjus/pyobjus.c:34152)
File "pyobjus.pyx", line 482, in pyobjus.class_get_methods (pyobjus/pyobjus.c:32077)
File "pyobjus.pyx", line 474, in pyobjus.objc_method_to_py (pyobjus/pyobjus.c:31931)
File "pyobjus.pyx", line 181, in pyobjus.ObjcMethod.__init__ (pyobjus/pyobjus.c:28225)
File "type_enc.pxi", line 15, in pyobjus.parse_signature (pyobjus/pyobjus.c:4228)
File "type_enc.pxi", line 4, in pyobjus.seperate_encoding (pyobjus/pyobjus.c:3999)
IndexError: list index out of range
```

Did I maybe miss to package a library?
##

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Reproduce the PyInstaller-packaged filechooser example on OS X Yosemite, then inspect type_enc.pxi, especially parse_signature and seperate_encoding, using the traceback as the entry point. Compare the packaged and un-packaged runs to determine why the Objective-C method encoding produces an empty list; done means the example no longer raises IndexError.

Written by the indexing model from the issue text.