Macrobond-data-api

- Better error messages when using automatic initialization
- Breaking change: get_series, get_many_series, get_entity, get_vintage_series and get_nth_release no longer uses *args for the set of series, but instead takes a sequence of series names
- Convenience methods get_one_vintage_series and get_one_nth_release have been added

What's Changed
* Add error for the com get_observation_history bug
* Fix for pd datetime in com
* Initial work to support subscription lists

**Full Changelog**: https://github.com/macrobond/macrobond-data-api/compare/v0.0.15...0.0.16

The first released public version

The first public version of the API