* Add a tool to update genesis time
* Minor touchups
* Merge branch 'master' into update-genesis-time
* Added a readme
* Merge refs/heads/master into update-genesis-time
* Merge branch 'update-genesis-time' of github.com:prysmaticlabs/prysm into update-genesis-time
* Merge refs/heads/master into update-genesis-time
* Merge refs/heads/master into update-genesis-time