* Rationalise state locking
* Rationalise state locking
* Merge branch 'state-locks' of github.com:mcdee/prysm into state-locks
* Merge branch 'master' into state-locks
* Add feature flag
* Merge
* Merge branch 'master' into state-locks
* Merge branch 'master' into state-locks
* Update locks
* Merge branch 'master' into state-locks
* Gazelle
* Tidy-ups
* Merge branch 'master' into state-locks
* Remove commentary to a docs.go file for better presentation on godocs
* Add newBeaconStateLocks as a --dev flag
* gofmt
* Merge branch 'master' into state-locks
