v0.0.3

* Fix broken authoritative scraping behavior introduced in 0.0.2.

From v0.0.2:
* Add support for monitoring recursors.
* Changes labels from `powerdns` to `powerdns_authoritative` and
  `powerdns_recursor` depending on exporter type.
* Control-socket specification format modified to specify the type of socket
  being exported - `authoritative` or `recursor`, e.g. "authoritative:unix:/some/socket"

v0.0.1

 * Initial Release.