RemotePi Supported Raspberry Pi 3 Case

I took funbarts design for a case that supports the remotepi board sold at http://www.msldigital.com/ and made a few modifications. It's not perfect, but I'm publishing it for anyone who wants to customize it for their needs. If I ever reprint it, I'm going to try to blend the tallest side on the bottom into the curve of the top of the case better.

- cut out a hole for the ir receiver (for the version of the board with the attached ir receiver)
- didn't have any 2.5 mm screws so I added pin