Uses math formula to calculate the amount
        of steem power that would have been regenerated
        given a certain datetime object

def calc_regenerated(self, lastvotetime):
        ''' Uses math formula to calculate the amount
        of steem power that would have been regenerated
        given a certain datetime object
        '''
        delta = datetime.utcnow() - datetime.strptime(lastvotetime,'%Y-%m-%dT%H:%M:%S')
        td = delta.days
        ts = delta.seconds
        tt = (td * 86400) + ts
        return tt * 10000 / 86400 / 5