all procedures have been cut in to enable the mbed and canon devices

Now use procedures rather then threads to get the posvel and trigger
responses. These are basically serial procedures. Need to wait on a
posvel response from mbed before we procede with a now platfopm/flight
line geometry computation. We use a timer to set the real-time progress
with the timer tick including a) getPosVel, b) platform/FL geometry
computation & trigger request (as required), followed by the trigger
request to mbed. The canon image-ready process remains a thread and will
match the trigger ties from mbed with the retrieved image file names
from the Canon thread.