digital/zigbit/common: fix zigbit stack hangs when loosing network
digital/io-hub/src/apbirthday, host/simu: add cherries cannon simulation
digital/io-hub/src/apbirthday: change start sequence
digital/io-hub/src/apbirthday: prefer backward movement for plates
digital/ai/tools: remove start position plate
eurobot/2013, digital/io-hub/src/apbirthday: change contact IO

Group plate contacts on the same connector.