* log error for metric
* reuse epoch e
* Better node comments
* Remove not needed breaks
* Use j over i
* Merge branch 'master' of github.com:prysmaticlabs/prysm into best-practice-pt1
* Descendent/Descendant
* Merge refs/heads/master into best-practice-pt1
* Update beacon-chain/forkchoice/protoarray/nodes.go
* Merge refs/heads/master into best-practice-pt1
* Merge refs/heads/master into best-practice-pt1
* Done
* Fixed lock
* Fixed all the tests
* Comments
* Fixed more tests
* Merge branch 'master' into better-head-obj
* Fixed more tests
* Merge branch 'better-head-obj' of git+ssh://github.com/prysmaticlabs/prysm into better-head-obj
* Prestons feedback & fixed test
* Nishant's feedback
* Participation edge case
* Gaz
* Merge branch 'master' into better-head-obj
* Merge branch 'master' of git+ssh://github.com/prysmaticlabs/prysm into better-head-obj
* Raul's feedback
* Merge branch 'better-head-obj' of git+ssh://github.com/prysmaticlabs/prysm into better-head-obj
