This is Qi Zhao's pull request#23

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zhaoqigood wants to merge 29 commits intogwdistsys18:masterfrom

zhaoqigood:master

Commits on Oct 21, 2018

Commits on Oct 25, 2018

Commits on Oct 26, 2018

Commits on Oct 27, 2018

Commits on Oct 28, 2018