* **simulation:** Ensure empty string is returned for optional IDF ([96fb612](https://github.com/pollination/handlers-python/commit/96fb61264dbfd76963a189b534e62d2dd1bb1738))
* **simulation:** Add handler to convert to an additional IDF file ([e980371](https://github.com/pollination/handlers-python/commit/e9803715987cd5f6673b6d5776abbf623c9c2212))
* **model:** Ensure that non-ASCII characters are acceptable in Python 2 ([7e7ce3f](https://github.com/pollination/handlers-python/commit/7e7ce3ffe8a07df462150c60e2a7489cc78da836))
* **bool_options:** Add a boolean option for annual-irradaince visible ([40485e5](https://github.com/pollination/handlers-python/commit/40485e5305afc73258a2bfd455a87f279ac1c84b))