add: allow monkeypatching
add: allow monkeypatching

karlfloersch/pyethereum,karlfloersch/pyethereum,ethereum/pyethereum,ddworken/pyethereum,ckeenan/pyethereum,ebuchman/daoist_protocol,ebuchman/daoist_protocol,ethereum/pyethereum,jnnk/pyethereum,shahankhatch/pyethereum,ethers/pyethereum,harlantwood/pyethereum,vaporry/pyethereum,holiman/pyethereum,pipermerriam/pyethereum,inzem77/pyethereum,ethermarket/pyethereum,shahankhatch/pyethereum,pipermerriam/pyethereum