* rem slasher proto
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* Merge branch 'master' of github.com:prysmaticlabs/prysm
* verify slashing
* added in test for pending att slashing
* tests starting to apss
* sig failed verify regression test
* tests passing for ops pool
* Update beacon-chain/operations/slashings/service.go
* Merge refs/heads/master into verify-slash-sig
* verify on insert
* tests starting to pass
* all code paths fixed
* imports
* fix build
* fix rpc errors
* Merge refs/heads/master into verify-slash-sig
* 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
* add to workspace
* impl
* include tests for func
* fix broken build
* test passing, found 2 bugs
* add errors package
* added in mockgen
* we check for insertion into the pool based on attester slashings
* test passing
* proper test
* Update beacon-chain/rpc/beacon/slashings.go
* Update beacon-chain/rpc/beacon/slashings_test.go