write default config to specified path if not available
write default config to specified path if not available

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