* added in logic
* latest countdown
* fixed up formatting and add tests
* ready for review
* Merge branch 'master' into countdown-genesis
* no log if after genesis
* Merge branch 'countdown-genesis' of github.com:prysmaticlabs/prysm into countdown-genesis
* countdown
* smarter logging
* added buffer period for countdown
* Merge refs/heads/master into countdown-genesis
