Sprit

**Full Changelog**: https://github.com/RJbalikian/SPRIT-HVSR/compare/v0.1.69-dev...v0.1.70-dev

Read the docs updates

What's Changed
* Azimuth by RJbalikian in https://github.com/RJbalikian/SPRIT-HVSR/pull/27


**Full Changelog**: https://github.com/RJbalikian/SPRIT-HVSR/compare/v0.1.68-dev...v0.1.69-dev

What's Changed
MINOR FIXES

* Azimuth by RJbalikian in https://github.com/RJbalikian/SPRIT-HVSR/pull/26


**Full Changelog**: https://github.com/RJbalikian/SPRIT-HVSR/compare/v0.1.66...v0.1.67-dev

**Full Changelog**: https://github.com/RJbalikian/SPRIT-HVSR/compare/v0.1.67-dev...v0.1.68-dev

What's Changed
* Azimuth by RJbalikian in https://github.com/RJbalikian/SPRIT-HVSR/pull/26


**Full Changelog**: https://github.com/RJbalikian/SPRIT-HVSR/compare/v0.1.66...v0.1.67-dev

- Add plotting tests capability
- Initial Calculation of Azimuth (not fully integrated)
- Raise lower value of hvsr_band default to 1Hz
- Other minor fixes

- Fix gui (DatePicker specifically)
- Fix minor issues with data processing