Copybara import of the project:

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10a55ff by Asugawara <asgasw@gmail.com>:

add nfsp

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7908ccc by Asugawara <asgasw@gmail.com>:

add Sonnet Linear Module

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5671c9f by Asugawara <asgasw@gmail.com>:

action_probs: LongTensor to Tensor

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b6b9d7d by Asugawara <asgasw@gmail.com>:

remove image and progress

COPYBARA_INTEGRATE_REVIEW=google-deepmind#450 from Asugawara:nfsp_pytorch b6b9d7d
PiperOrigin-RevId: 345889227
Change-Id: Ib5558b3e05f4cfe96c1a9854a6956100b03ee2d4

Merge pull request google-deepmind#239 from michalsustr:master

PiperOrigin-RevId: 315790097
Change-Id: I9bf375a5e04dc0713be8f5c806c17e4349ecc808