adding license at the end of every file for CC-BY-SA

[leios]

I, James Schloss, the copyright holder of this work, irrevocably grant anyone the right to use the Algorithm Archive, including derivatives created during the review process, under the Creative Commons Attribution ShareAlike 4.0 license (legal code). (Anyone may use, share or remix this work, as long as they credit the appropriate author and share any derivative work under this license.)

This means that all previous versions of the Algorithm Archive before this point are still under CC-NC, but all versions beyond this point will be appropriately attributed to the author of each chapter and chapter editors.

Full discussion can be found in the #493.

[june128]

I think we need to modify the license section a bit to also include graphics and PRs and be more structured. I thought of something like this for the License section:

License

Text

The text of this of this chapter by PERSON, PERSON, ... and PERSON is licensed under CC BY-SA 4.0.

Code

The code examples are licensed under the MIT license (found in LICENSE.md).

Images/Graphics

• The first image "IMAGENAME" by PERSON is licensed under CC BY-SA 4.0.
• The second image "IMAGENAME" by PERSON is licensed under CC BY-SA 4.0.
  ...
• The nth image "IMAGENAME" by PERSON is licensed under CC BY-SA 4.0.

Pull Requests

The following Pull Requests changed this chapter:

• #560
• PR
  ...

---

Changes

• I changed the wording for the attribution a bit. This way it's shorter and complies with https://wiki.creativecommons.org/wiki/Best_practices_for_attribution
• The new images/graphics section allows us to credit the author of each image/graphic properly.
• The new PR section enables the reader to easily comprehend the progress of the chapter creation.
• The general structure allows for an easier overview.

To comply with https://wiki.creativecommons.org/wiki/Best_practices_for_attribution (and since it's good to do so) we should also try to make IMAGENAME and PERSON links, if possible.
For new chapter contributions we can then ask each person easily how they want to be linked.

[june128]

Since two of the images were created by me, more specifically: "split_op_method" and "huffman_tree", here's also my statement (I don't know, if it's really needed, but it doesn't hurt for sure).

I, Julian Schacher, the copyright holder of the images "split_op_method" and "huffman_tree", irrevocably grant anyone the right to use this work, including derivatives created during the review process, under the Creative Commons Attribution ShareAlike 4.0 license (legal code).

(Anyone may use, share or remix this work, as long as they credit me and share any derivative work under this license.)

[june128]

Looks good except for two little errors.

[leios]

Cool, thanks for catching those!