An other RaspberryPi Case

I designed this housing because I found no housing with the following features:
- Wallmountable
- only less or small holes --> No dirt inside
- No screws exept for wallmounting

This housing is mainly made for my SmartHome project.
It has only holes for Power, USB, and LAN.
Holes are as small as possible.
Because the Pi can be used up to 70°C --> No active cooling and no big holes ;-)

The STL-Files with _v2 have some minor improvements:
- shorter pins because the long pins easily break.
- bigger radii on thh edges for more easy mounting
- shorter spacers --> less presure on cover