piSlice - stackable HAT case for FLIRC Pi Zero metal case (includes case for Waveshare Ethernet / USB HUB HAT)

### Stackable case for extra HATs to be added on top of FLIRC's Raspberry Pi Zero case.

I've included three case models plus USB-brigde-cover (for Waveshare's Ethernet / USB HUB HAT):
* **TEMPLATE** - this is a basic piSlice case template to be further modified (cutting or stretching middle layers to change overall height to fit particular HAT and to add needed cutouts),
* **DESKTOP** - variant of piSlice is designed for Waveshare's Ethernet / USB HUB HAT to be used as a desktop case,
* **DIN** - variant of DESKTOP piSlice case but with additional holes on the back wall spaced at 25 & 37 mm to accommodate some of the cheap plastic DIN rail clips (holes should fit M4 bolts)

Not sure what the tolerances are for Flirc's cases since mine didn't exactly match provided dimensions. There is a sketch picture with dimensions showing top view of the model for verification.
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Links:
https://flirc.tv/more/flirc-raspberry-pi-zero-case
https://www.waveshare.c