Fixed bugs in json rpc interface
Fixed bugs in json rpc interface

changwu-tw/pyethapp,d-das/pyethapp,ethereum/pyethapp,ethereum/pyethapp,vaporry/pyethapp,changwu-tw/pyethapp,RomanZacharia/pyethapp,gsalgado/pyethapp,RomanZacharia/pyethapp,gsalgado/pyethapp