Problem with the @app.option decorator

When I try to execute the script the following error shows:

```
Traceback (most recent call last):
  File "commandLineTest.py", line 10, in <module>
    import compago
  File "/usr/local/lib/python3.5/dist-packages/compago/__init__.py", line 3, in <module>
    from option import Option
ImportError: No module named 'option'
```

Installed using `pip3 install compago`
