Added hyperozemia event to Blood Chemistry Methodology.

Updated patient methodology table with old change from 16 to 12 bpm.
Added outputs to mechanical ventilator scenarios.

Adding Environment Support to C#

See merge request !41

Feature/multiplex ventilation

See merge request !40

Added OSI plot test.

Cleaned up a couple comments.

Added an Python analysis of patient edge cases that are stabilizing at some PEEP and PIP combinations, but not others.
A little more clean up.

Units update

Merge branch 'feature/multiplex_ventilation' of https://gitlab.kitware.com/physiology/engine into feature/multiplex_ventilation

Updated EtCO2 data request to more common units.
A couple new COVID-19 bib items.

Tweas to respiratory methodology table.