NEWS.txt

## v0.4.9, 05.2022
* fix issue with missing unit conversion in h_px and h_tx
* add tests for fixed bugs
* fix error in demo script
* add new demos based on the work of @stu314159
* improve code readability by using additional tools
** enforce code styling with black
** reduce minimal python version to 3.4 based on report from vermin
** fix more spelling mistakes with codespell

## v0.4.8, 03.2021
* Fix issue #10: certain values lead to an infinite loop, stop if values dont change anymore and warn user
* Spelling

## v0.4.7, 01.2021
* Setup: add fallback to distutil if setuptools is not available

## v0.4.6, 12.2020
* removed stump for IAPWS R15 as it containd a error that need further work but left the constants define in R15
* non functional changes
** fix code style in multiple locations
** add github workflows for package and publish

## v0.4.5, 07.2020
* add functions from IAPWS R4 and R14
** R14: pressure along the melting and sublimation curves
** R4: viscosity and thermal conductivity as a function of density and temperature for heavy water substance
** test cases from documentation
** demo diagram
** add new constants

## v0.4.4, 06.2020
* fix bug in value check code in region_pT(p, T). Thanks to @sbatururimi for reporting this!

## v0.4.3, 04.2020
* switch to pytest for testing because of 'setup.py test' is deprecated, see https://github.com/pypa/setuptools/issues/1684.

## v0.4.2, 07.2019
* fix for error in table selection for calculations for density as a function of pressure and enthalpy. Current tests did not indicate this problem - thanks to gonmolina!

## v0.4, 2018
* support for Python 3
** handling of math expressions in python 3 fixed problems with some edge cases
** one test still fails: w_ps Speed of sound as a function of pressure and entropy
* fix multiple typos
* linting / cleanup of code
* add constant for absolute zero point
* command line selection for demo program
* new tests for UnitConverter

## v0.3.3b1, 21.01.2018
* fix for typo

## v0.3.3, 21.01.2018
* change changelog to markdown
* add gitignore
* remove unnecessary files
* reworked setup.py for more sanity
* cleanup and better logging

## v0.3.1, 18.02.2014
* logging capability's

## v0.3, 08.02.2014
* User can now use ft/lb/sec/°F/psi/btu, m/kg/sec/°C/bar/W or m/kg/sec/K/MPa/W

## v0.2, 03.02.2014
* demos, changes to unitTests and some minor fixes - 8 Tests fail

## v0.1, 11.02.2014
* Initial release. - 26 Tests fail