Merge pull request #1840 from ethersphere/console

cmd/geth/js.go

cmd/geth/main.go

cmd/utils/cmd.go

cmd/utils/flags.go

common/docserver/docserver.go

common/natspec/natspec_e2e_test.go

common/registrar/registrar.go

common/registrar/registrar_test.go

crypto/crypto.go

eth/backend.go

rpc/api/admin.go

rpc/api/api_test.go

rpc/api/personal.go

rpc/api/personal_args.go

rpc/api/utils.go

rpc/jeth.go

rpc/useragent/remote_frontend.go

xeth/frontend.go