“offset” property added to options that adds a period of time (in milliseconds) to the calculation of time difference between “now” and “end time“. Useful if countdown calculation to “end time” is imprecise due to user's date and time settings.
“updateOffset” public method added that updates the offset.
Merge branch 'master' of github.com:rkalnins/countdown into rkalnins-master
Merge branch 'rkalnins-master'
v2.1.0

- Add `offset` option to adjust the time difference between `now` and `endDate`. #8