Brushless Foldable Nano Quad 120mm

Tiny brushless quad based on ArduinoProMicro and multiwii
Runs on 1S 300mah for 5-6 min
Handled successfully a few dozen of crashes, actually the frame is stronger than the motors axes :(
41g including battery

[first fly](https://youtu.be/e9XrE1P7ODo)