uptest.py: capture output from ping
uptest.sh: adding SILENCE file support
upmonitor.py: New, simple system for tracking and summarizing recent pings.
upmonitor.py: some comments
upmonitor.py: small tweaks to output aesthetics, history retention
upmonitor.py: Added logging, tweak to history pruning.
upmonitor.py: added curl option
upmonitor.py: precision sleeping
uptest.py: middle of rewrite (not working)
upmonitor.py: fix sleep mode bug, add shutdown signal handling