Once #1475 is complete, populate part data for all parts that fabric documentation exists for. #1475 should be done first to avoid duplicating all of the fabric data repeatedly.

for example replace stdio.h with cstdio throughout all the projects. and so forth...

During the work on merging #1419 I figured out that the basic BUFGMUX example works differently on Arty Board and Nexys Video.

The example uses three LEDs:

• led[2] - blinks with slow frequency
• led[1] - blinks with high frequency
• led[0] - blinks with the same frequency as led[2] or led[1] depending on sw[0] state.

On the Arty Board, the example works as intended. On Nexys Video, when