Fit recent slim resnet#27

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LemonAniLabs wants to merge 3 commits intowarmspringwinds:masterfrom

LemonAniLabs:dev

Commits on Jun 30, 2017

Fit recent slim resnet
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Commits on Jul 13, 2017

For cityscape training
LemonAniLabs
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Commits on Aug 1, 2017

Change Cityscape class number to 4
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