Opower

What's Changed
* Add support for Arizona Public Service by seferino-fernandez in https://github.com/tronikos/opower/pull/95

New Contributors
* seferino-fernandez made their first contribution in https://github.com/tronikos/opower/pull/95

**Full Changelog**: https://github.com/tronikos/opower/compare/v0.7.0...v0.8.0

What's Changed
* Add National Grid Upstate NY Implementation by X-sam in https://github.com/tronikos/opower/pull/91

New Contributors
* X-sam made their first contribution in https://github.com/tronikos/opower/pull/91

**Full Changelog**: https://github.com/tronikos/opower/compare/v0.6.0...v0.7.0

What's Changed
* Enmax: improve error handling by aman207 in https://github.com/tronikos/opower/pull/89
* Add Support for Mercury NZ Limited by SplicedNZ in https://github.com/tronikos/opower/pull/87

New Contributors
* SplicedNZ made their first contribution in https://github.com/tronikos/opower/pull/87

**Full Changelog**: https://github.com/tronikos/opower/compare/v0.5.2...v0.6.0

- [Add HALF_HOUR and QUARTER_HOUR](https://github.com/tronikos/opower/commit/bcb62c5744ac9408486706c4520c5639639d1c93)
- [Add csv arg](https://github.com/tronikos/opower/commit/6a96b931a7a5b8d1200e298c283d7b31cc681037)
- [Rename demo.py to __main__.py](https://github.com/tronikos/opower/commit/6cd65cea678da2b7c5cb3b04dd314765ccd790ee)