rename fields to improve understanding, adapting maintenance.py (intermediate)

games/action/smash.md

@@ -5,9 +5,9 @@ _Super Smash Bros-like in HTML5._
 - Home: http://smash.gouchon.com/
 - State: mature
 - Keywords: web
-- Code: https://github.com/guillaume-gouchon/smash.js
-- Language(s): Javascript
-- License: MIT
+- Code repository: https://github.com/guillaume-gouchon/smash.js
+- Code language: Javascript
+- Code license: MIT
 
 ## Building