Create docs/tutorial/ consistent with other TF projects

[missaugustina]

Per mailing list conversation (https://groups.google.com/a/tensorflow.org/forum/#!topic/io/ctHeERQj5nw) we should create a docs/tutorials directory to house Colab Jupyter notebooks.

Please assign this issue to me, I'm working on a tutorial for the change referenced in the mailing list link above - #30

[yongtang]

@missaugustina Assigned to you, thanks!

[missaugustina]

• look at other projects for examples of this directory structure

Other projects store these in docs starting from the parent level directory of the repository. The use of the "tutorials" directory is less consistent for projects following this structure.

tensorflow/tensorboard - https://github.com/tensorflow/tensorboard/tree/master/docs

• .yamllint
• _book.yaml
• _index.yaml
• _project.yaml

tensorflow/tfx - https://github.com/tensorflow/tfx/tree/master/docs/tutorials

• _index.yaml
• _toc.yaml

tensorflow/tensor2tensor - https://github.com/tensorflow/tensor2tensor/tree/master/docs/tutorials

• asr_with_transformer.md "Add a placeholder to link to the official ASR tutorial"

tensorflow/datasets - https://github.com/tensorflow/datasets/tree/master/docs

• a mix of markdown & yaml files

[missaugustina]

• determine best initial stub document

Because other projects consistently use markdown, I'm going to initialize this new directory structure with a README.md file with instructions for creating & submitting a tutorial.

• find other Tensorflow tutorials using Colab & Jupyter from the repos listed above
• reverse engineer how they got into the repo & document the steps

Questions to sort out:

• Is there a template we want contributors to use? Yes - https://github.com/tensorflow/docs/blob/master/tools/templates/notebook.ipynb
• How should people license the content? I noticed explicit licensing/copyright in the examples.

Per Apache 2 license, a copyright holder must be listed & this is in the template. I've asked who "Tensorflow authors" refers to.

edit: Tensorflow authors is covered by the CLA. The author submitting the content would qualify as a Tensorflow author.

[missaugustina]

Create Readme document with the following sections:

• What content makes sense
• How to submit
• Formats (maybe just cover Jupyter to start)

[lamberta]

Looks like there's work on the landing page here: #498
and would be great to get some notebooks that we can pull into tensorflow.org (similiar to the tf-addons notebook tutorials).

Would like to link off to this from the main tutorials section, so these load_data notebooks might provide a useful starting point.

cc: @MarkDaoust

[MarkDaoust]

There's one notebook in the works here: #591, I've given some feedback on how they can integrate with the tensorflow.org setup.

[kvignesh1420]

@yongtang can this be closed?

[yongtang]

@kvignesh1420 Thanks yes this can be closed now.