tune threshold from 40ms to 20ms to compute drift faster

more poll interval testing/improvements

Improvements on ntp poll interval - still work in progress

updated algo

update poll interval calculations

Updated NTP algo with drift. Still need to find a way to speed up initial sync and drift calculation.

minor comment update

improved poll interval calculation based on our trust of the drift value

updated NTP calculations

Merge branch 'master' of github.com:liebman/AnalogClock