lock when adding blocks
lock when adding blocks

danielnovy/test,ethereum/pyethapp,vaporry/pyethapp,RomanZacharia/pyethapp,gsalgado/pyethapp,kustomzone/pyethapp,d-das/pyethapp,changwu-tw/pyethapp,RomanZacharia/pyethapp,gsalgado/pyethapp,changwu-tw/pyethapp,heikoheiko/pyethapp,ethereum/pyethapp