Smallest Case for N5BOC's Duplex MMDVM

This is my attempt to make a very small case for [N5BOC's excellent Duplex MMDVM modem](https://www.tindie.com/products/dave31418/mmdvm-duplex-in-pi-zero-form-factor-duplex/). In order to do this, I replaced the standard Pi headers with low-profile headers from SamTec, and then designed a case around it.

** This build is not for the faint of heart. It involves desoldering and soldering on a $100+ MMDVM modem board, which could result in destroying an expensive bit of kit **

** See the "H