Merge pull request #1283 from ethersphere/frontier/accounts

accounts/account_manager.go

accounts/accounts_test.go

cmd/geth/js_test.go

cmd/geth/main.go

cmd/utils/flags.go

crypto/crypto.go

crypto/key_store_passphrase.go

crypto/key_store_plain.go

eth/backend.go

xeth/xeth.go