ImportError: No module named 'translator_web'

Can't run the flaskr.py
```
Traceback (most recent call last):
  File "translator_web/flaskr.py", line 3, in <module>
    from translator_web.eng_to_fra_char_translator_predict import EngToFraCharTranslator
ImportError: No module named 'translator_web'
```