[Docs] Update the license and copyright docs

Author: bbatsov

README.md

@@ -256,10 +256,10 @@ site. [[Become a sponsor](https://opencollective.com/cider#sponsor)]
 
 ## License
 
-Copyright © 2012-2020 Tim King, Phil Hagelberg, Bozhidar Batsov, Artur Malabarba and
-[contributors](https://github.com/clojure-emacs/cider/contributors).
+CIDER is Distributed under the GNU General Public License, version 3.
 
-Distributed under the GNU General Public License, version 3
+Copyright © 2012-2020 Bozhidar Batsov, Artur Malabarba, Tim King, Phil Hagelberg and
+[contributors](https://github.com/clojure-emacs/cider/contributors).
 
 [badge-license]: https://img.shields.io/badge/license-GPL_3-green.svg
 [nREPL]:https://github.com/nrepl/nrepl

doc/modules/ROOT/pages/about/license.adoc

@@ -1,13 +1,15 @@
-= License
+= License & Copyright
 :experimental:
 
+== Code License
+
 CIDER is distributed under the GNU General Public License, version 3, the same as Emacs.
 
 TIP: Type kbd:[C-h C-c] in Emacs to view it.
 
 `cider-nrepl` is distributed under the Eclipse Public License, the same as Clojure.
 
-== Documentation
+== Documentation License
 
 All the original text is available under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).
 
@@ -16,3 +18,7 @@ All the original Emacs Lisp code is available under the terms of the GNU General
 All the original Clojure code is available under the terms of the Eclipse Public License 1 or any later version.
 
 NOTE: Reach out to Bozhidar if you have any questions about licensing.
+
+== Copyright
+
+© 2012-2020 Bozhidar Batsov, Artur Malabarba, Tim King, Phil Hagelberg and CIDER contributors.