Seg

[chunhuizhang]

No description provided.

[vchuravy]

This url should point to the image included in this PR

[antinucleon]

We can commit image to dmlc/web-data to reduce repo size

[vchuravy]

Thanks :) I added some comments, but somebody else should probably review this too.

I would suggest that when you address the comments you rebase and squash the commits so that it doesn't have any merge (or otherwise superflous) commits.

[piiswrong]

Good work! Think this is a really good example. It illustrates how to write an DataIter for custom data and how to write custom solver for custom model.

We have got a lot of questions for how to do this. It would be great if you can summarize your work into a tutorial on how to feed data and how to do custom bind and solve.
Also, given that you had to write a new solver from scratch, what do you think about the _train_multi_device refactoring here #909? Maybe you can refactor your solver to use ExecutorManager and improve the interface in the process?

[tornadomeet]

hi, all, this examples changed some code of mashadow and mxnet specificly for seg , so there is some style we should debat,. btw, the code is some dirty, i'll rearrange the sample in this weekend~ so please wait for me some days, thanks.

[tqchen]

close this PR till @tornadomeet 's update