add: ipython requirement
add: ipython requirement

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