* Migrate ChainStarted and StateInitialized to state notifier
* Provide state notifier to powchain service
* Merge remote-tracking branch 'upstream/master'
* Merge remote-tracking branch 'upstream/master'
* Remove commented line
* Merge branch 'master' into master
* Merge branch 'master' into master
* Merge remote-tracking branch 'upstream/master'
* Merge branch 'master' of github.com:mcdee/prysm
* Accept err from HeadState() as non-fatal
* Merge branch 'master' into master
* Merge branch 'master' into master
* Merge branch 'master' into master
* add fixes
* more changes
* simplify the solution
* add shuffle
* remove prom metric
* add to mock
* go doc
* use non default source
* add test
* terence's review
* all tests passing
* Save new validators in DB
* Use info
* Add total validator count
* Fixed tests
* Add new test
* Revert light client config
* Add state metrics back
* Gaz
* Mark old ones as deprecated
* Deprecate not --next services
* Fixed all operation tests
* Fixed node test
* All tests passing locally
* Add deprecated-p2p back, blocked by boostrap-query
* Revert message proto
* delete deprecated DB items
* delete all other instances of old db
* gaz
* cycle rem
* clear db
