Merge pull request #28 from ethersphere/feature/keys

ethchain/block.go

ethchain/block_chain.go

ethchain/dagger.go

ethchain/genesis.go

ethchain/state.go

ethchain/state_manager.go

ethchain/state_object.go

ethchain/state_transition.go

ethchain/transaction.go

ethchain/vm.go

ethcrypto/crypto.go

ethcrypto/key_manager.go

ethcrypto/key_store.go

ethcrypto/keypair.go

ethcrypto/keyring.go

ethcrypto/keys_test.go

ethcrypto/mnemonic.go

ethcrypto/mnemonic.words.lst

ethcrypto/mnemonic_test.go

ethereum.go