StairBuilder v.1.0 beta3

I continue to bore you with my ramblings.
Probably this version will be the last with the classical look.
I intend to modify it accordingly with my taste.
From CHANGELOG:
-decide to use terms accordingly with https://inspectapedia.com/Stairs/Ideal- ... ations.php
-improve round spiral stair calculation
-set turn step count as default for squared turn stair in place of step count
-add slope percent values
-fix partially job results for squared turn stair

TODO:
-generate the custom cut out shape for all but especially for round spiral stairs
-add pre-maded localization files for all available languages

Disclaimer:
Not always is WYSIWYG.
Most of the calculus I suppose it is correct but their interpretation need to be improved.
So,
USE IT WITH CARE!