Merge pull request #2909 from fjl/account-manager-cleanup

accounts/account_manager.go

cmd/abigen/main.go

cmd/geth/accountcmd.go

cmd/geth/consolecmd.go

cmd/geth/main.go

cmd/gethrpctest/main.go

cmd/utils/flags.go

common/compiler/solidity.go

common/compiler/solidity_test.go

console/console_test.go

core/types.go

eth/backend.go

eth/bind.go

ethdb/database.go

internal/ethapi/api.go

internal/ethapi/backend.go

internal/ethapi/solc.go

miner/miner.go

miner/worker.go

node/config.go