Enstat

What's Changed
* Adding tests histogram by tdegeus in https://github.com/tdegeus/enstat/pull/20
* Integrating readme with documentation by tdegeus in https://github.com/tdegeus/enstat/pull/21
* histogram: improving out of range handling by tdegeus in https://github.com/tdegeus/enstat/pull/22


**Full Changelog**: https://github.com/tdegeus/enstat/compare/v0.7.3...v0.7.4

What's Changed
* Fixing density calculation by tdegeus in https://github.com/tdegeus/enstat/pull/18


**Full Changelog**: https://github.com/tdegeus/enstat/compare/v0.7.2...v0.7.3

**Full Changelog**: https://github.com/tdegeus/enstat/compare/v0.7.1...v0.7.2

**Full Changelog**: https://github.com/tdegeus/enstat/compare/v0.7.0...v0.7.1

**Full Changelog**: https://github.com/tdegeus/enstat/compare/v0.6.0...v0.7.0

What's Changed
* Adding optional threshold for mean and variance by tdegeus in https://github.com/tdegeus/enstat/pull/16


**Full Changelog**: https://github.com/tdegeus/enstat/compare/v0.5.0...v0.6.0