Write up terms of service & licensing about bookshelf HOT 4 CLOSED

@natashawatkins I had asked on July 19. I will follow up on this.

In the meantime I checked mybinder and they don't actually have a terms of service etc. I think we just need the basics like 1. don't post copyrighted material, 2. your notebooks may be removed if deemed inappropriate etc.

from bookshelf.

Let's put up something basic, then, as @mmcky suggests, and wait for the response from NumFOCUS --- at which point we can make it more comprehensive.

Why don't we also put a statement saying that all notebooks published on the site are considered to be released under BSD-3 (or MIT)?

from bookshelf.

By submitting to QuantEconLib you acknowledge:

1. the content in your notebook is available and shared with the public internet
2. your notebook does not contain any illegal or copyrighted material
3. any notebook that is submitted to this service may be viewed and downloaded by users visiting this website.
4. all software contained in the notebooks are considered to be released under a BSD-3 license.
5. QuantEcon reserves the right the delete your notebook if found to violate these terms and conditions

from bookshelf.

added in commit b5e583b

from bookshelf.