simple Mount for Micro Servos

This "thing" is a simple mount for a micro servo of type "SG90". The servo may be easily screwed onto the bracket using the screws that come with every servo (and unscrewed later, if needed), the bracket itself is intended to be glued onto a base.

The model has been designed using [OpenJSCAD](https://openjscad.xyz/), a Web-based object modeller based on JavaScript definitions - the defining script is enclosed and may be modified as needed.

**Update:** I increased the `WallThickness` from 2mm to 3mm - this does not cost much more material but improves stability enormously