gEDA PCB demonstration.
pcb fork by Peter Clifton, http://pcjc2.blogspot.ru/2011/02/pcbgl-repository-instructions.html
pcb plugins collected by Bert Timmerman, https://github.com/bert/pcb-plugins
Teardrops plugin by DJ Delorie, http://www.delorie.com/pcb/teardrops/
PPA: https://launchpad.net/~mehanik/+archive/geda-unstable
