Merge pull request #71 from wziard/blender-4-fixes

Some blender 4 fixes

Update import.rst

Black reformatting

Delete obsolete file

Raise supported Blender version

Update changelog

Adjust screenshot call to latest Blender api changes

Adjust screenshot operator call to Blender 3.0

Ensure correct python executable path for Blender 2.8

Ensure a consistent sys.path state