Taz 3 Raspberry PI 2 extension

This is a slightly shorter version of DiscoJohn's Taz 5 cover that will fit a Taz 3 control box. I also added a side slot cover, additional plates will be available for that once I figure out what needs to go there. The cover is designed to seat into 2 M3 heat set inserts.

edit 1: Mod 1.1 includes integrated support for the flat bridge section. I also moved the support bolt holes back where they were rather than the 11mm I had moved them. it seemed like a good idea at the time.