Parametric Angled Clamp Mount

__version 1.1 changes__
* new parameter Support Inset for creating a hole in the structure supporting the mount. I use this to run cables through.
* The module should now be usable from other scad files.

I initially made this very simple clamp for mounting a pair of realsense 435 cameras onto a pipe with a diameter of 28mm (central heating pipe). For a multi camera setup to work, it is important to know the relative position and orientation between cameras. Having a fixed angle mount that I could clamp to a pipe makes the setup very rigid and mobile.

## Customizing

By making it parameterized it can be used for a lot more, like attaching pipes to a wall at a specific angle and basically adding anything that accepts 2 bolts to be mounted to any pipe shaped structure.

### Size
The height of the clamp (Z) when printing as shown. Some parts of the ring are scaled based on this size.

### Ring Inner Diameter
Set this to the outer diameter of the pipe to clamp to wit