First draft of Mainboard, Displayboard and Leddriver board

Mainboard: https://github.com/Kbij/rgb-clock/raw/master/pcb/RGBClock/Mainboard.pdf
Displayboard: https://github.com/Kbij/rgb-clock/raw/master/pcb/RGBClock/Displayboard.pdf
Leddriverboard: https://github.com/Kbij/rgb-clock/raw/master/pcb/RGBClock/Leddriverboard.pdf