add monitor endpoint
add aps.py
use msgpack to pack the array [sequence,timestamp,expiry/status]
to be in keeping with the new spec
use millitime as timestamp
aps to gsd
gsd
workable
refactor, still under construction
workable again TODO: subprocess management
simple subprocess management
add subset test sample
prepare pygsd package layout
Try to fix broken literal blocks
spec changes to markdown
The default time unit is millisecond
add optional extra message