iPhone 6s Case

There are many other iPhone 6s cases on Thingiverse but this one is mine. It has the following features that I wanted.
* It fits the phone very tightly.
* The front of the case is just above the screen.
* The buttons are sunken making them difficult to push.

NOTE: The scad file is for OpenSCAD version 2017.01.20. Earlier versions will render the corners as circles instead of 90° arcs.