More board cleanup.
More board cleanup.

- wpan-atrf.brd: rearranged ground areas to prevent sections from being
  cut off
- wpan-atrf.brd: on PCB, added descriptive text, chip orientation, and
  version

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan