The first release of `osier` on PyPI and publication of documentation on
[readthedocs](https://osier.readthedocs.io/en/latest/).
Added
- `osier.Technology` class that stores data about technologies and handles units.
- `osier.DispatchModel` class that generates a simple a dispatch model when users pass
`osier.Technology` objects.
- Publishes documentation on [readthedocs](https://osier.readthedocs.io/en/latest/).