Hello, when installing tzwhere in a venv with pip using Python 3.6 (or 3.5) both json files 'tz_world.json' and 'tz_world_shortcuts.json' are missing: ``` shell $ python3 -m venv test_pytzwhere $ source test_pytzwhere/bin/activate (test_pytzwhere) $ pip install tzwhere (test_pytzwhere) $ tree test_pytzwhere/lib/python3.6/site-packages/tzwhere* test_pytzwhere/lib/python3.6/site-packages/tzwhere ├── __init__.py ├── __pycache__ │ ├── __init__.cpython-36.pyc │ └── tzwhere.cpython-36.pyc └── tzwhere.py test_pytzwhere/lib/python3.6/site-packages/tzwhere-3.0.1-py3.6.egg-info ├── PKG-INFO ├── SOURCES.txt ├── dependency_links.txt ├── installed-files.txt ├── requires.txt └── top_level.txt ``` Removing the Line "include_package_data=True," from the setup.py (https://github.com/pegler/pytzwhere/blob/master/setup.py#L19) seems to fix the problem - is this needed by anything else?