travel: added cpsk bus and train info

Please, would you mind testing it before merging? I haven't managed to get imhd running :/
@Adman would it be possible to get this to pypi? That way we could add ti to `requirements.txt` and that would be it.

Alternatively, this could be still added there and installed from the repo itself, like `pip install -e git://github.com/Adman/python-cpsk-api.git#egg=cpsk`