Ns1-python

ENHANCEMENTS:

* Add a helper class for concurrency [40](https://github.com/ns1/ns1-python/pull/40)
* Add `update` methods to scopes and reservations [39](https://github.com/ns1/ns1-python/pull/39)

ENHANCEMENTS:

* Add (required) `sourcetype` arg to `source.update`. API requires it, although it cannot be changed. [38](https://github.com/ns1/ns1-python/pull/38)
* Add lease reporting endpoint [37](https://github.com/ns1-python/pull/37)

IMPROVEMENTS:

* Add unit tests for data (source) [38](https://github.com/ns1-python/pull/38)

ENHANCEMENTS:

* Added `use_client_subnet` (alias for `use_csubnet`) parameter to `records` resource [36](https://github.com/ns1/ns1-python/pull/36). Thanks to ignatenkobrain!
* Added `primary` parameter to `zones` resource [35](https://github.com/ns1/ns1-python/pull/35)

IMPROVEMENTS:

* Allow Scopegroups to be loaded by ID [33](https://github.com/ns1/ns1-python/pull/33)