Standard format for Caffe models to enable easy distribution with forthcoming "model zoo"

[sergeyk]

This PR will impose a certain structure on all example models we distribute, and add scripts to

• easily download trained models
• push/pull model definitions and readmes to Gists, such that models can be easily distributed but still versioned.

Consult docs/model_zoo.md for the proposed changes.

[Yangqing]

Oh my, you deleted the braincells quote :)

[shelhamer]

I'm pretty sure examples should still be ignored. If you execute any ipynb it will change the contents since new matplotlib figures are generated but you hardly want to commit that.

[shelhamer]

@sergeyk rebased to fit paths to example standardization and took care of model extensions. Still need to fix model / path references in examples.

[sergeyk]

I'm updating the Imagenet example now.

[shelhamer]

@sergeyk awesome. Let me know if you need any help and I'll do a pass for merge.

[sergeyk]

Okay I think this is done. Sadly, there is no commandline tool to download gists, and I'm not about to write github authentication code. We'll add that nicety later -- the upload works like clockwork now.

[bhack]

@sergeyk Can we use some of the helper python library o handle gist download?

[shelhamer]

Thanks Sergey! This will be a good format for models coming out.

A follow-up can add gist downloading.