Update README.md

Author: mitmul

README.md

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 Temporal Generative Adversarial Nets
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+**The new version of TGAN has been published and the code is available: [TGANv2](https://github.com/pfnet-research/tgan2).**
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 This repository contains a collection of scripts used in the experiments of
 [Temporal Generative Adversarial Nets with Singular Value Clipping](https://arxiv.org/abs/1611.06624).