checking transaction queue for pending transaction

refactored loading of state tests

tests for deserialization of transaction from issue #835

unlocks with no expiration [on top of 833]

Unlock accounts on CLI.

Make BlockNumber optional, fix eth_call

Test socket to common test code (ethcore-devtools)

Use network id for the web3_net_version return.

json-rpc web3_sha3

[ci-skip]

remove some unused files

debug symbols for master/beta

Syntax helpers for IPC RPC