Merge pull request #402 from aaronfranke/2.1-readme-license

[2.1] Update README and LICENSE

LICENSE.md

@@ -3,7 +3,8 @@
 
 ************************************************************************
 
- Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.
+ Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.
+ Copyright (c) 2014-2020 Godot Engine contributors.
 
  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the

README.md

@@ -4,11 +4,16 @@ Each folder containing an `engine.cfg` file is a demo project meant to
 be used with [Godot Engine](https://godotengine.org), the open source
 2D and 3D game engine.
 
-## Important note
+## Godot versions
 
-- The `master` branch is compatible with the latest Godot version (currently 3.0).
-- Use the appropriate branch for your Godot version, such as the
-  [`2.1`](https://github.com/godotengine/godot-demo-projects/tree/2.1) branch
+- The [`master`](https://github.com/godotengine/godot-demo-projects) branch is compatible with the latest stable Godot version (currently 3.2).
+- If you are using an older version of Godot, use the appropriate branch for your Godot version:
+
+  - [`3.1`](https://github.com/godotengine/godot-demo-projects/tree/3.1) branch
+  for Godot 3.1.x.
+  - [`3.0`](https://github.com/godotengine/godot-demo-projects/tree/3.0) branch
+  for Godot 3.0.x.
+  - [`2.1`](https://github.com/godotengine/godot-demo-projects/tree/2.1) branch
   for Godot 2.1.x.
 
 ## Useful links