Otto Customizable

This is Otto DIY reverse engineered into OpenSCAD, making him parametric and customizable! All measurements are approximate at a precision of 0.01 max.

So far the bot's size is scalable, and the head ports are configurable (i.e. you can select to use Arduino Uno instead of Nano).

This is an in-process thing, and there may be issues with the current SCAD. If you see anything off, please let me know.

**Changelog**:
* 2020-03-12 Added Feet (for use with nylon gear "SG90" servos) and Leg (for use with metal gear "MG90S" servos, you'll need 2)
* 2017-08-02 Went OCD on nose settings
* 2017-07-31 Added option to specify servo type (MG90S vs SG90) for hips and ankles