Stupid bullshit to support my drawing machine.

Dependencies: `pyserial, Pillow, PyBluez, nOBEX`  
nOBEX: https://github.com/nccgroup/nOBEX  
Linedraw: https://github.com/LingDong-/linedraw  
nOBEX uses sdptool to create a new service in the background, so it will need to be ran as root.