Added bytes support to abi.py
Added bytes support to abi.py

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