[WIP/not-for-merge] Initial resnet implementation#1613

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danpovey wants to merge 14 commits intokaldi-asr:kaldi_52from

danpovey:kaldi_52_resnet

Commits on May 7, 2017

[src,scripts,egs] Early work on resnets. Will simplify before merging.
danpovey
committed
[src] Changes to image augmentation RE RGB space. Likely won't merge: didn't help.
danpovey
committed

Commits on May 8, 2017

[src] Add SumBlockLayer; add averaging at top of resnet; rewrite and simplify resnet config generation; more examples.
danpovey
committed

Commits on May 9, 2017

Commits on May 12, 2017

[src,scripts,egs] Add various tuning experiments; add new shrinkage-related options in training; slight refactoring of how shrinkage is applied in all scripts.
danpovey
committed

Commits on May 13, 2017