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

games/framework/polycode.md

@@ -5,13 +5,13 @@ _Polycode is a C++ and Lua framework for building interactive applications._
 - Home: http://polycode.org/
 - Download: http://polycode.org/download/
 - State: beta
-- Code: https://github.com/ivansafrin/Polycode
-- Language(s): C, C++
+- Code repository: https://github.com/ivansafrin/Polycode
+- Code language: C, C++
 - Code license: MIT
 
 ## Building
 
-Uses CMake
+- Build system: CMake
 
 [Build Instructions](https://github.com/ivansafrin/Polycode/blob/master/BUILD.md)