Update list of tech on homepage. Possibly add an extensive list?

[lionleaf]

Right now our home page says "Oculus Rift. Arduino. Raspberry Pi" at the bottom (with a picture of a DK1). Should make sure it's obvious that this is only some of it, and maybe change the tech displayed (3D-printer comes to mind).

Potentially make a more complete list that can be expanded. I think someone made that in some branch, look for it.