Opentiva

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**Improvements**

- Update documentation

**Bugfixes**

- Fixed typos
- Fixed readthedocs documentation of api

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**Improvements**

- Update and tidy up requirements
- Move cython and matplotlib to optional requirements
- Add nix python flake for development shell
- Add remimazolam with Schmith and Schuttler models
- Add etomidate with Lin and Kaneda models
- Update docs with new modules

**Bugfixes**

- Fixed pkpd cython module import

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**Improvements**

- Added Klamp ketamine model
- Documentation updates

**Bugfixes**

- Fixed ke0 example
- Added missing self to Schnider model

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First working release