[fix] weight configurable via engines.cfg

        weight = 1.0

        if hasattr(engines[res['engine']], 'weight'):

            weight = float(engines[res['engine']].weight)

        elif res['engine'] in settings.weights:

            weight = float(settings.weights[res['engine']])

        score = int((flat_len - i)/engines_len)*weight+1

        duplicated = False

        for new_res in results: