Запрос на слияние 'develop' (#1) из develop в master

Fix file README.md.

New file README.md

New file - point.py, poligon of points.

New file - laval_nozzle.scad

Fix file README.md.

New file README.md

New file - point.py, poligon of points.

New file - laval_nozzle.scad

STL: prepating to testing print.

Module nozzle_set(). smoothing nozzle versus turbulation.

README: link to GitHub report rubber-drum.

Fix images

Images: screenshot of Bluetooth_Speaker from OpenScad.

README: description of models, place for screenshot and link to PHYWE web-site.

New file - nozzle.scad.

Module nozzle_kit(): difference nozzle and scaled nozzle.

Modules frame_ring() and nozzle().

Correct diameter of speaker walls to 5mm

Modules square_plate(), frame_square().

Openration hill() - cube to cylinder.