New Features
- Add a check command ([18](https://github.com/pydanny/nbz/issues/18))
- Add commands notebook ([13](https://github.com/pydanny/nbz/issues/13))
- Add spinner for slow processes ([11](https://github.com/pydanny/nbz/issues/11))
- Broke up functions into help panels by category ([6](https://github.com/pydanny/nbz/issues/6))
- Migrate most logic from nbz/cli.py to nbs/core.ipynb, and add tests. ([5](https://github.com/pydanny/nbz/issues/5))
- Convert nbdev functions to nbz functions ([3](https://github.com/pydanny/nbz/issues/3))