Bbox export

[Tarcontar]

• support mesh property 'two sided'
• inform user on export if vertices are not rigged to any bone -> throw an error on export
• Bugfix: no negative values for bounding box extend
• added new batch file to be able to run tests individually

[codecov[bot]]

Codecov Report

Merging #192 (b82b269) into master (45586e8) will decrease coverage by 66.11%. The diff coverage is 30.76%.

@@             Coverage Diff             @@
##           master     #192       +/-   ##
===========================================
- Coverage   98.52%   32.40%   -66.12%     
===========================================
  Files          50       50               
  Lines        4261     4293       +32     
  Branches      772      777        +5     
===========================================
- Hits         4198     1391     -2807     
- Misses         55     2828     +2773     
- Partials        8       74       +66     

Impacted Files	Coverage Δ
io_mesh_w3d/common/utils/box_export.py	14.28% <11.11%> (-59.79%)	:arrow_down:
io_mesh_w3d/common/utils/mesh_export.py	64.70% <19.04%> (-35.30%)	:arrow_down:
io_mesh_w3d/common/utils/mesh_import.py	40.56% <66.66%> (-59.44%)	:arrow_down:
io_mesh_w3d/common/structs/mesh.py	27.98% <100.00%> (-72.02%)	:arrow_down:
io_mesh_w3d/common/utils/material_import.py	37.64% <100.00%> (-62.36%)	:arrow_down:
io_mesh_w3d/custom_properties.py	100.00% <100.00%> (ø)
io_mesh_w3d/w3d/export_w3d.py	2.50% <0.00%> (-97.50%)	:arrow_down:
io_mesh_w3d/w3x/export_w3x.py	3.61% <0.00%> (-96.39%)	:arrow_down:
io_mesh_w3d/common/utils/animation_export.py	10.22% <0.00%> (-89.78%)	:arrow_down:
io_mesh_w3d/w3x/import_w3x.py	14.47% <0.00%> (-85.53%)	:arrow_down:
... and 44 more

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[Tarcontar]

replaced by #193