MPR-A5-V11 wifi router model

This is a mildly detailed model for the mini MPR-A5-V11 router.
This router is cheap as dirt and supported by [OpenWRT](https://wiki.openwrt.org/toh/unbranded/a5-v11). I use these for several projects like a WebRadio, a RTL SDR server and others.
The model is intended to ease the design of cases. Besides the model itself, the source includes a location function to accurately place cutout volumes.
I have checked the measurements against two real router PCBs, but be aware that there could still