M4 WiFi Module for Amstrad CPC

This is a case for the M4 WiFi module (v2 - the larger one) for Amstrad CPC by Duke at [Spinpoint.org](http://www.spinpoint.org).

I started with the version from povvercrazy, as it had much better screw support (the original failed on me). I also added a support grid on the inside to avoid warping, and I've put some text on the top side.