Make assets license clearer to understand; remove unused logo

Author: Bromeon

assets/godot-ferris-license.md

@@ -0,0 +1,21 @@
+# Asset licenses
+
+The godot-rust logo is derived from some of the following work.  
+Minor changes to improve rendering have been applied by godot-rust contributors.
+
+| Asset             | Website                | Author             | License           |
+|-------------------|------------------------|--------------------|-------------------|
+| Rust Ferris       | [rustacean.net]        | _(not attributed)_ | [Public Domain]   |
+| Ferris emoji      | [noct.zone]            | Dzuk               | [CC BY-NC-SA 4.0] |
+| Godot logo        | [godotengine.org]      | Andrea Calabró     | [CC-BY-4.0]       |
+| godot-rust Ferris | [godot-rust.github.io] | _(not attributed)_ | [CC BY-NC-SA 4.0] |
+
+
+[rustacean.net]: https://www.rustacean.net
+[noct.zone]: https://noct.zone
+[godotengine.org]: https://godotengine.org
+[godot-rust.github.io]: https://godot-rust.github.io
+
+[Public Domain]: https://creativecommons.org/publicdomain/zero/1.0
+[CC-BY-4.0]: https://creativecommons.org/licenses/by/4.0
+[CC BY-NC-SA 4.0]: https://creativecommons.org/licenses/by-nc-sa/4.0