$ python model.py
 Traceback (most recent call last):
  File "model.py", line 118, in <module>
    generator.build()
  File "/sequential/sequential.py", line 83, in build
    self.from_json(json)
  File "/sequential/sequential.py", line 109, in from_json
    self.from_dict(dict_array)
  File "/sequential/sequential.py", line 116, in from_dict
    link = self.layer_to_chainer_link(layer)
  File "/sequential/sequential.py", line 76, in layer_to_chainer_link
    return layer.to_link()
  File "/sequential/layers.py", line 157, in to_link
   return chainer.links.Linear(**args)
TypeError: __init__() got an unexpected keyword argument 'bias'