Pywincalc

- New vacuum model with additional pillar geometries
- Vacuum gas calculations are using correct gas mixture (including water and air)
- Fixed issues for airflow calculations when using Venetian, Woven and Perforated screens when window dimension is different from 1x1 m
- Openness and airflow permeability factors renamed according to documentation
- Custom airflow coefficients are allowed for layers with airflow permeability

- Added ability to model forced ventilation in gaps.
- Added the ability to specify measured deflection for deflection calculations.

- Added product_subtype, coating_name, coated_side to ProductData object

- Added vacuum gaps.
- Optical standards files are now included with package.
- Glazing systems now default to using the NFRC optical standard.
- Refactored and simplified creating user-defined shades.
- Simplified and expanded example scripts.

- Updated the version of wincalc to v2.2.4. This should allow genBSDF xml files as input and add more descriptive error messages around optional values.

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