* **model:** Add properties for units_system and tolerance ([edf17f4](https://github.com/ladybug-tools/honeybee-core/commit/edf17f43a42b7b8b9de835fad6955ff9265a54d9))
* **boundarycondition:** Update based on recent schema change ([a5a4535](https://github.com/ladybug-tools/honeybee-core/commit/a5a453524168ff6978606101d338778bf6e515e2))
* **shade:** Add property to track whether Shade is on the indoors ([8800a50](https://github.com/ladybug-tools/honeybee-core/commit/8800a5092c3a03c1d43c7a44ab50dd6d06918a43))
* **add_prefix:** Include option to add prefix to extension attributes ([c5afc7d](https://github.com/ladybug-tools/honeybee-core/commit/c5afc7d63af0912b0381e06d98e5caf679f0136e))
* **config:** Update OSError for all Python Versions ([f97b1a0](https://github.com/ladybug-tools/honeybee-core/commit/f97b1a026b5afb9959cff5331072714f41a8148e))