update release version to 0.4.0 (pytorch#561)

Update version of plugin to 0.3.1

Update version for tb_plugin 0.3.0

tb_plugin 0.2.1

Update README.md (pytorch#288)

Add communication recommendation for tb_plugin (pytorch#273)

Merge branch 'TomWildenhain-Microsoft-tom/different_dist_colors' into…

… plugin/0.2

remove number of device (pytorch#127)

* remove number of device

Co-authored-by: Teng Gao <tegao@microsoft.com>

Merge pull request pytorch#84 from gaoteng-git/update_gpu_flag

split is_gpu_used into 3 switches

Fix the setup.py