Tripod adapter for Guerilla Projectors

Attaches [GuerillaBeams projectors](http://www.thingiverse.com/thing:692318) to any tripod.
Can simply be snapped on and off the projector repeatedly.

There are currently 3 versions:
* flat base
* quick mount base (42mmx42mm), for cheap tripods with integrated heads. Fits different different Velbon, Hama and similar tripods
* quick mount base, for Arca Swiss-like clamp heads, experimental, needs testing (by you?)

All adapters feature 1/4-20 tripod screw threads.
Because 3d printed th