removes an unused include
convert MPC command dispatching to a callback lookup table.
regression: order of arguments to *_send(...)

fixes regressions in chest,back,shoulder, phasor that caused compile
errors due to chaning the order of arugments in phasor_comm_send() and
mpc_send()
track a file that should have been added already

should have been added in d2d5b3a23c988551f5479d421aad10cecd16e5aa
pull in changes from master to fix compile errors