Adds information regarding porting code/assets from other codebases (…

…#35112)

* we need more license memes in our contributing.md

* adds goon's licensing

* contributing memes

* licenses are too serious for kor

.github/CONTRIBUTING.md

@@ -381,6 +381,12 @@ There is no strict process when it comes to merging pull requests. Pull requests
 
 * Please explain why you are submitting the pull request, and how you think your change will be beneficial to the game. Failure to do so will be grounds for rejecting the PR.
 
+## Porting features/sprites/sounds/tools from other codebases
+
+If you are porting features/tools from other codebases, you must give them credit where it's due. Typically, crediting them in your pull request and the changelog is the recommended way of doing it. Take note of what license they use though, porting stuff from AGPLv3 and GPLv3 codebases are allowed.
+
+Regarding sprites & sounds, you must credit the artist and possibly the codebase. All /tg/station assets including icons and sound are under a [Creative Commons 3.0 BY-SA license](https://creativecommons.org/licenses/by-sa/3.0/) license unless otherwise indicated. However if you are porting assets from GoonStation or usually any assets under the [Creative Commons 3.0 BY-NC-SA license](https://creativecommons.org/licenses/by-nc-sa/3.0/) license are to go into the 'goon' folder of the /tg/station codebase.
+
 ## Banned content
 Do not add any of the following in a Pull Request or risk getting the PR closed:
 * National Socialist Party of Germany content, National Socialist Party of Germany related content, or National Socialist Party of Germany references

goon/LICENSE.md

@@ -0,0 +1,4 @@
+This work is licensed under the Creative Commons
+Attribution-NonCommercial-ShareAlike 3.0 United States License. To view a copy
+of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/us/ or
+send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.

goon/README.md

@@ -0,0 +1,8 @@
+# Goon-ported-assets
+
+All files excluding this one you're reading right now have been most likely, taken from [goonstation's 2016 release](https://github.com/goonstation/goonstation-2016), unless stated otherwise.
+It is very likely that there are modifications to be compatible or on par with our code, however. These changes are licensed under the same license as the other goon files.
+
+## License
+
+See LICENSE.md