Move licensing information

Author: sfan5

LICENSE.md

@@ -0,0 +1,5 @@
+While the code of the `default` mod was written from scratch it often follows the
+original C++ code closely, so out of caution **LGPLv2.1 (or later)** was chosen as license.
+Most media files were directly copied from Minetest-c55 0.3.1 which is **CC BY-SA 3.0**.
+
+For details please check the LICENSE.txt files in individual mods, notably [default](mods/default/LICENSE.txt).

README.md

@@ -15,14 +15,6 @@ Unlike the original it has (optional) support for:
 This is a game for the [Minetest engine](https://www.minetest.net/), install
 at least version 5.5.0 to play it.
 
-## Licensing
-
-While the code of the `default` mod was written from scratch it often follows the
-original C++ code closely, so out of caution **LGPLv2.1 (or later)** was chosen as license.
-Most media files were directly copied from Minetest-c55 0.3.1 which is **CC BY-SA 3.0**.
-
-For details please check the LICENSE.txt files in individual mods.
-
 ## Credits
 
 Thanks to Perttu Ahola (celeron55) `<celeron55@gmail.com>` and other random contributors