Raspberry Pi blade for modular mini server case

This is an updated Raspberry Pi blade for the modular mini server case by @IBI Productions. The position of the holes has changed in order to enable easier cable access and routing when the blade is inserted into the case. Also screws in the back are now countersunk and the spacer size on the front has been changed to minimal size necessary. The holes are designed for M3 screws as they are easier to find than the original M2.5 of the Raspberry Pi, but it should also work with that size.